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 $(0,-\displaystyle \frac{5}{2})$,
we start at the origin,
$ x=0\Rightarrow$ we move neither to the left nor right,
(we stay on the y-axis,)
$ y=-\displaystyle \frac{5}{2}\Rightarrow$ and then down by $2.5 $ units
(we stay on the y-axis.)
