Please help me with the answer!! There is the picture of the problem^

f(x) = -4x -3

Step-by-step explanation:

(3, -15) and (-1, 1)

the slope is m= (y2-y1) / (x2-x1) = -15-1 / 3+1 = -16/ 4 = -4

(y- 1) = -4 ( x +1)

y -1 = -4x -4

y = -4x -4+1

y= -4x -3

Omg at school recently we learned the exact same thing.

(x-8)+4x=7x-16

5x-8=7x-16

-5x    -5x

-8=2x-16

+16    +16

8=2x

4=x

7(4)-16

The answer is 12*