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y = -2x + -4

Step-by-step explanation:

the y intercept is -4

this is where it crosses the y axis

the slope is change in y over change in x

(-2,0)  (0,-4)

slope = (y2-y1)/(x2-x1)

slope = (-4-0)/(0--2)

    = -4/(0+2)

    = -4/2

    = -2

y = mx+b  where b is the y intercept and m is the slope

y = -2x + -4

the answer is 16ft

step-by-step explanation:

step-by-step explanation:

once you graph it hit 2nd (the blue button) and graph

that takes you to a table of coordinates

on the left is x coordinates and on the right is y coordinates and an empty box

(you may have to scroll up/down in order to get ( x, 0)