Write the equation's of the lines using the given information
m=-2, (3, -7)

y = -2x-1

Step-by-step explanation:

The formula for a line is .

Plug in the information given in the problem: y-(-7) = -2(x-3)

So you get y+7 = -2x+6.

The final form you want needs to be equal to y (that means you want y by itself on the left side of the equals), so subtract 7 from both sides.  

You get y = -2x-1

the answer for this question is 38