Section 8.6

Slope-Intercept Form

Can you graph the line?

-slope of ¾ and passes through the point (-2,5)

-slope of -2 and a y-intercept of 5.

Graph the Equation

32

1 xy

What is the slope?

What is the y-intercept?

2

1m

3int y

Slope-Intercept Form

m = slope

b = y-intercept

y = mx + b

Graph the Equation

74 xy

m = 4

b = -7

Find the slope and y-intercept, then graph.

1054 yx

1223 yx

15 yx

Baking A school group making cookies for a bake sale spends $75 on ingredients and then sells the cookies for $5 a dozen. The amount earned y can be represented by the equation , where x equals the number of dozens sold.

Graph the equation.

T-Shirts A T-shirt company spends $150 on materials to make T-shirts and then sells the shirts for $12 each. The amount earned y can be represented by the equation , where x represents the number of shirts sold.

Homework

P 400-401 13-31 odds; 32 – 35 all