Question

What is the equation for f-1(x)? Help needed 10 points math 3!!!

Answer 1

ANSWER

A.

${f}^{ - 1} (x) = 4x - 3$

EXPLANATION

Given

$f(x) = \frac{x + 3}{4}$

Let

$y= \frac{x + 3}{4}$

Interchange x and y

$x= \frac{y + 3}{4}$

Solve for y,

$4x = y + 3$

y=4x-3

This implies that,

${f}^{ - 1} (x) = 4x - 3$