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1) 0.75

2) y = x - 3

3) (4, 0); (0, -3)

Step-by-step explanation:

Convert to slope-intercept form (y = mx + b) by solving:

y = x - 3

m is the slope, so or you can write as 0.75.

To find the x and y intercepts, set the y value to zero and solve (x-intercept), and b is the y-intercept.

x = (b + 15) / a

Step-by-step explanation:

ax - b = 15

add b to both sides

ax = b + 15

Divide both sides by a

x = (b + 15) / a