Slope-Intercept Form

m = 3, b = -7

B) y = 2/3x

y = 2/3x + 0

m = 2/3, b = 0

C) y = 5

y= 0x +5

m = 0, b = 5

Put it in slope-intercept form. (Solve for y.)

-3y = -5x + 6

y = 5/3x - 2

m = 5/3, b = -2

B) 4y + 2 = 2x

*Put it in slope-intercept form. (Solve for y.)

4y = 2x - 2

y = 2/4x - 2/4

m = 1/2, b = -1/2

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1

3

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• Example 5: You can use a laser or inkjet printer to print an 18-page report. The laser printer prints 6 pages/ minute and the inkjet printer prints 4.5 pages/ minute. The models give the number of pages p left to print after t minutes.

laser: p = -6t + 18

inkjet: p = -4.5t +18a) Graph both models in the same coordinate

plane.

b) How many minutes do you save using the

laser printer?

(2,6)

(5,4)(0,4)

(6,0)(0,1)

(6,-4)