Answer
See image
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Work Step by Step
In a plane, we define a rectangular coordinate system by drawing two perpendicular number lines, intersecting at their respective zeros.
The horizontal number line is called the x-axis, and the vertical is the y-axis.
The intersection of the axes is called the origin.
An ordered pair corresponds to each point in the plane, with the first coordinate taken from the x-axis, and the second from the y-axis.
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Plotting $(-\displaystyle \frac{5}{2},0)$,
we start at the origin,
$ x=-\displaystyle \frac{5}{2}\Rightarrow$ we move 2.5 units to the left,
$ y=0\Rightarrow$ and neither up nor down....
(we stay on the x-axis.)