Draw the graph of the equation represented by the straight line which is parallel to the $x$-axis and is $4$ units above it.

(N/A) Any straight line parallel to the $x$-axis is given by the equation $y=k$,where $k$ is the distance of the line from the $x$-axis.
Here,the line is $4$ units above the $x$-axis,so $k=4$.
Therefore,the equation of the line is $y=4$.
To draw the graph of this equation,plot the points $(1,4)$,$(2,4)$,and $(3,4)$ on the Cartesian plane and join them with a straight line. This line represents all points where the $y$-coordinate is $4$.