Answer
The graph is moved up or down.
Work Step by Step
The red graph is the graph of $
y=2x
.$
The blue graph is the graph of $
y=2x-5
.$
The green graph is the graph of $
y=2x+5
.$
Given the equation, $y=ax+b,$ $b$ is the vertical movement (or translation) of the graph $y=ax.$