Question

Find the inverse of the function: f(x)=1/5x+4

Answer 1

Answer:

B. ${f}^{ - 1} (x) = 5x - 20$

Step-by-step explanation:

$f(x) = \frac{1}{5} x + 4$

$y = \frac{1}{5} x + 4$

$x = \frac{1}{5} y + 4$

$\frac{1}{5} y + 4 = x$

$y + 20 = 5x$

$y = 5x - 20$

$\boxed{\green{{f}^{ - 1} (x) = 5x - 20}}$