Answer:
k = g(x)/f(x)
Step-by-step explanation:
Unless there is more to the question, the answer is g(x) / f(x) = k
You just need to divide both sides by f(x)
Here's an example
f(x) = 20x + 40
g(x) = 80x + 160
k = g(x)/f(x) = (80x + 160) / (20x + 40) = 4*(20x + 40)/(20x + 40)
k = 4
