Question

What is the value of k in the function f(x)=112-kx if f(-3)=121?

Answer 1

k = 3

Explanation:

f(x) = 112 - kx ------------------(I)

f(-3) = 121

In equation (I) substitute x = -3

112 - k*(-3) = 121

112 + 3k = 121

3k = 121 - 112

3k = 9

k = 9/3

k = 3