Find the inverse of f (x) = 2x+9

To find the inverse of this function, we need to perform some steps.

f (x) = 2x + 9

Replace f (x) with y.

y = 2x + 9

Swap x and y.

x = 2y + 9

Solve for y.

Subtract both sides by 9.

x - 9 = 2y

Divide both sides by 2.

(x - 9) / 2 = y

Replace y with f^-1 (x)

f^-1 (x) = (x - 9) / 2