Answer
The graph of $y=x+1.5$ is the graph of $y=x$ translated $1.5$ units upward.
Refer to the green graph below.
Work Step by Step
Make a table of values for $y=x$ and $y=x+1.5$ (refer to the table below).
Then, graph each function by plotting each ordered pair and connect the set of points using a straight line.
(Refer to the graph above. The black graph is $y=x$ and the green graph is $y=x+1.5$.)
Note that the value of $x+1.5$ is $1.5$ greater than the value of $x$.
Thus, the graph of $y=x+1.5$ is the graph of $y=x$ translated $1.5$ units upward.