The graph of the line is in the image at the end.
How to graph the line?
We have two types of constant lines, these are:
y = a
This is a horizontal line where the value of y is constant.
x = a
This is a vertical line, where the value of x is constant.
Here we have the line:
x = -0.5
So we have a vertical line where the value of x of all the points is -0.5, so the graph of this line is the one you can see in the image below.