Chapter 5 - Linear Functions - 5-8 Graphing Absolute Value Functions - Practice and Problem-Solving Exercises - Page 345: 28

$y = abs (x-9)$

The formula $y = abs (x+b)$ moves the absolute value graph $b$ units to the left (if $b$ is positive). If $b$ is negative, then the graph shifts $b$ units to the right. We want to move to the right 9 units, so we will use -9 for b.