f(x )= - 3/4x + m
a)
f(-8) = -4
f(-8)= -3/4 * (-8) + m
-4 = 6 + m
m = -10
b)
f(1) = - 3/4x + m
f(1) = - 3/4 * 1 + (-10)
f(1) = - 3/4 - 10
f(1) = -43 / 4
c)
f(x)= - 12
f(x) = - 3/4x + m
- 12 = - 3/4x + (-10)
- 12 + 10 = - 3/4x
-2 * - 4 / 3 = x
8 / 3 = x