Question

Given the function f(x)=3+1/8x find a formula for the inverse function

Answer 1

f-1(x) = 8x - 24

You can get this by switching the x and f(x) and then solving for f(x)

f(x) = 3 + 1/8x ---> now switch them
x = 3 + 1/8f(x) ---> now subtract 3 from both sides
x - 3 = 1/8f(x) ---> now multiply both sides by 8
8x - 24 = f(x) ----> ANSWER