Respuesta :

Answer:

f = 3

Step-by-step explanation:

Slope m = (y2-y1)/(x2-x1)

Using (6,8) and (f,-7) then

m = (-7 - 8)/(f - 6) = 5

- 15 = 5(f - 6)

-15 = 5f - 30

5f = 30 - 15

5f = 15

f = 3