Determine if Injective (One to One) f(x)=|x-9|

$f (x) = | x - 9 |$

Step 1

Write $f (x) = | x - 9 |$ as an equation.

$y = | x - 9 |$

Step 2

A function is said to be injective or one-to-one if every y-value has only one corresponding x-value.

Not injective (Not One-to-One)

Step 3