Question

Unit 1 Test Review

1. Find inverse of f(x) = 3x + 4 / 5

(show step by step)

Answer 1

$y=f(x)=3x+\frac{4}{5}\\ Since, \space 3x=y-\frac{4}{5}\\ x=\frac{y}{3}-\frac{4}{15}\\ Therefore, \space f^{-1}(y)=\frac{y}{3}-\frac{4}{15}$