x of the line. 2 pointslope form slopeintercept form ...€¦ · slopeintercept form. a) write an...

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3538 point slope day 2.notebook February 26, 2013 p.35 LT#6: I can write and graph equations in pointslope form. What is slopeintercept form? What is pointslope form? Let's Practice: There is a line that passes through the point (4, 3) and has a slope of 2. b) Rewrite the equation in slopeintercept form . a) Write an equation in pointslope form of the line. Graph the equation: y +2= (x 3). 2 3 y x b) Rewrite the equation in slopeintercept form. a) y +2= (x 3). 2 3 Write an equation in pointslope form of the line. Equation #1 Equation #2 m: point: m: point:

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Page 1: x of the line. 2 pointslope form slopeintercept form ...€¦ · slopeintercept form. a) Write an equation in pointslope form of the line. 1. p.37 P CW 3. y x Graph the line that

35­38 point slope day 2.notebook February 26, 2013

p.35LT#6: I can write and graph equations in point­slope form.

What is slope­intercept form?

What is point­slope form?

Let's Practice:

There is a line that passes through the point (4, ­3) and has a slope of 2.

b)  Rewrite the equation in  slope­intercept form .a) Write an equation in point­slope form of the line. 

Graph the equation:

y + 2 =    (x ­ 3).23

y

x

b)  Rewrite the equation         in slope­intercept form.

a)

y + 2 =    (x ­ 3).23

Write an equation in point­slope form  of the line.

Equation #1 Equation #2m:

point:m:

point:

Page 2: x of the line. 2 pointslope form slopeintercept form ...€¦ · slopeintercept form. a) Write an equation in pointslope form of the line. 1. p.37 P CW 3. y x Graph the line that

35­38 point slope day 2.notebook February 26, 2013

p.36Problem Solving ­ 1 problem asked in 3 different ways.Suppose you have $500 in your savings account.  You save $25 each month.  Write an equation in slope­intercept form that represents how much money you will have after x months.

1a.

You have some money in your savings account.  You will add $25 each month to your account.  By month 8 you have $700.  How much money did you start with in your savings account?

1b.

You add the same amount of money to your savings each month.  In month 5 you have $625.  In month 12 you have $800.  How much money do you have by month 17?

1c.

2a. A newspaper editor starts his career out making $4,280.  He gets a $790 raise each year.  Write an equation in slope­intercept form that gives his total money made after x years.

2b. A newspaper editor gets a $790 raise each year.  In his 8th year, he is making $10,600.  How much money did the editor make when he first started working?

2c. A newspaper editor gets the same raise each year.  In his 5th year of work he made $8230.  In his 9th year he made $11,390.  How much will he make after working for 15 years?  

Page 3: x of the line. 2 pointslope form slopeintercept form ...€¦ · slopeintercept form. a) Write an equation in pointslope form of the line. 1. p.37 P CW 3. y x Graph the line that

35­38 point slope day 2.notebook February 26, 2013

x

y

Graph the equation:    y ­ 1 = ­( x ­ 2)

2. a) b)  Rewrite the equation         in slope­intercept form.

 y ­ 1 = ­(x ­ 2)

There is a line that passes through  the point  (­1, 4) and has a slope of ­2.

b)  Rewrite the equation in  slope­intercept form .a) Write an equation in point­slope form of the line. 

1.

p.37PCW

3.

y

x

Graph the line that goes through (6, 5) and  (­2, 1).

a)Write an equation of the line from part a in point­slope form using the point (6, 5).  Then, rewrite it in  slope­intercept form.

b)Write an equation of the line in part a in point­slope form  using the point (­2, 1).  Then, rewrite it in slope­intercept form.

c)

(2ab, 4abc) p.37­38

Page 4: x of the line. 2 pointslope form slopeintercept form ...€¦ · slopeintercept form. a) Write an equation in pointslope form of the line. 1. p.37 P CW 3. y x Graph the line that

35­38 point slope day 2.notebook February 26, 2013

p.38Problem Solving ­ 3 problems asked in 3 different ways.4a.

4b.

4c.

5a.

5b.

5c.

Your gym membership costs $33 per month.  The initial membership fee to join is $60.  Write an equation in slope­intercept form that represents the total cost you pay for your gym membership after x months.

Your gym membership costs $33 per month after an initial membership fee.  You paid a total of $258 after 6 months.  What is the cost of the initial membership fee?

Your gym charges the same rate per month.  You have paid $192 after 4 months.  You have paid $390 after 10 months.  How much will you pay after 16 months at the gym?

The initial cost of renting a moving van is $60.  Then it cost $0.25 per mile.  Write an equation in slope­intercept form that represents the total cost of renting a moving van after x miles.

Renting a moving van costs $0.25 per mile.  You paid $65 for 20 miles.  What is the initial cost of renting the moving van?

Cost of renting a moving van for a 25 mile trip is $66.25.  Renting the same moving van for a 45 mile trip is $71.25.  The cost changes at a constant rate.  What is the total cost of renting the moving van for a 62 mile trip?

Page 5: x of the line. 2 pointslope form slopeintercept form ...€¦ · slopeintercept form. a) Write an equation in pointslope form of the line. 1. p.37 P CW 3. y x Graph the line that

35­38 point slope day 2.notebook February 26, 2013

IFWhat is point­slope form? Write an equation of the 

line in point­slope form given two points.

(2, 5) and (­4, ­4)

Checking:p.33­34Wed box

Page 6: x of the line. 2 pointslope form slopeintercept form ...€¦ · slopeintercept form. a) Write an equation in pointslope form of the line. 1. p.37 P CW 3. y x Graph the line that

35­38 point slope day 2.notebook February 26, 2013

p.33

Page 7: x of the line. 2 pointslope form slopeintercept form ...€¦ · slopeintercept form. a) Write an equation in pointslope form of the line. 1. p.37 P CW 3. y x Graph the line that

35­38 point slope day 2.notebook February 26, 2013

p.34

Page 8: x of the line. 2 pointslope form slopeintercept form ...€¦ · slopeintercept form. a) Write an equation in pointslope form of the line. 1. p.37 P CW 3. y x Graph the line that

35­38 point slope day 2.notebook February 26, 2013

Functions Review

1­4 3­45­8 7­8

Shen Shen

9­12 11­12Shen Shen

13­16 15­16Shen ShenShen Shen

17­20 19­2021­24 23­24

Shen Shen

25­27 27Shen ShenShen Shen

28­30 29­3031­34 33­34

Shen Shen

35­38 37­38Shen Shen

Page 9: x of the line. 2 pointslope form slopeintercept form ...€¦ · slopeintercept form. a) Write an equation in pointslope form of the line. 1. p.37 P CW 3. y x Graph the line that

35­38 point slope day 2.notebook February 26, 2013

p.35LT#6: I can write and graph equations in point­slope form.

What is slope­intercept form?

What is point­slope form?

Let's Practice:

There is a line that passes through the point (4, ­3) and has a slope of 2.

b)  Rewrite the equation in  slope­intercept form .a) Write an equation in point­slope form of the line. 

Graph the equation:

y + 2 =    (x ­ 3).23

y

x

b)  Rewrite the equation         in slope­intercept form.

a)

y + 2 =    (x ­ 3).23

Write an equation in point­slope form  of the line.

Equation #1 Equation #2m:

point:m:

point:

Page 10: x of the line. 2 pointslope form slopeintercept form ...€¦ · slopeintercept form. a) Write an equation in pointslope form of the line. 1. p.37 P CW 3. y x Graph the line that

35­38 point slope day 2.notebook February 26, 2013

p.36Problem Solving ­ 1 problem asked in 3 different ways.

Suppose you have $500 in your savings account.  You save $25 each month.  Write an equation in slope­intercept form that represents how much money you will have after x months.

1a.

You have some money in your savings account.  You will add $25 each month to your account.  By month 8 you have $700.  How much money did you start with in your savings account?

1b.

You add the same amount of money to your savings each month.  In month 5 you have $625.  In month 12 you have $800.  How much money do you have by month 17?

1c.

Page 11: x of the line. 2 pointslope form slopeintercept form ...€¦ · slopeintercept form. a) Write an equation in pointslope form of the line. 1. p.37 P CW 3. y x Graph the line that

35­38 point slope day 2.notebook February 26, 2013

p.36Problem Solving ­ 1 problem asked in 3 different ways.

2a. A newspaper editor starts his career out making $4,280.  He gets a $790 raise each year.  Write an equation in slope­intercept form that gives his total money made after x years.

2b. A newspaper editor gets a $790 raise each year.  In his 8th year, he is making $10,600.  How much money did the editor make when he first started working?

2c. A newspaper editor gets the same raise each year.  In his 5th year of work he made $8230.  In his 9th year he made $11,390.  How much will he make after working for 15 years?  

Page 12: x of the line. 2 pointslope form slopeintercept form ...€¦ · slopeintercept form. a) Write an equation in pointslope form of the line. 1. p.37 P CW 3. y x Graph the line that

35­38 point slope day 2.notebook February 26, 2013

Answers2b)  y = ­1x + 3

2a)

4a) y = 33x + 604b) $604c) $588

CW

P(2ab, 4abc)p.37­38

Page 13: x of the line. 2 pointslope form slopeintercept form ...€¦ · slopeintercept form. a) Write an equation in pointslope form of the line. 1. p.37 P CW 3. y x Graph the line that

35­38 point slope day 2.notebook February 26, 2013

p.37

Page 14: x of the line. 2 pointslope form slopeintercept form ...€¦ · slopeintercept form. a) Write an equation in pointslope form of the line. 1. p.37 P CW 3. y x Graph the line that

35­38 point slope day 2.notebook February 26, 2013

p.38