Slope Intercept Form

Graph an equation using the slope and the y intercept and write an

equation of a line.

Slope and y intercept

y = 3/2x - 4

y = 3/2x + 3

(0, ?)

(0, ?)

Vocabulary

• y – intercept : where the line crosses the y axis.

• Slope – intercept form: y = mx + bm = slopeb = y – intercept

Identify the slope and y - intercept

1. y = 3x – 2

2. Y = -2x – 8

M = 3B = -2

M = -2B = -8

Graph

• y = 1/3x + 5

Graph

• y = 2/3x - 6

Graph

• y = 2/5x + 1

Graph

• y = -x - 1

What are the slope and y – intercept of y = x?

Write an equation of the line. Use slope intercept form. Y = mx + b

What is the y – intercept (b)?

What is the Slope (m)?

2

-2

y = 2x - 2

Write an equation of the line. Use slope intercept form. Y = mx + b

What is the y – intercept (b)?

What is the Slope (m)?

1

3

y = x + 3

Group Challenge

• Why is it impossible for any point to lie on both y = 3x + 5 and on y = 3x – 2? Use a graph to illustrate your explanation.

Write an equation of the line. Use slope intercept form. Y = mx + b

What is the y – intercept (b)?

What is the Slope (m)?

1/2

4

y = 1/2x + 4

Explain why it is impossible for any for any point to lie on both y = 3x + 5 and y = 3x -2? Use a graph to illustrate your explanations.

Group Challenge