Answer:
D. x = 3
Step-by-step explanation:
(3,-5) is an x,y pair. 3 is the x and -5 is the y.
A vertical line (up and down line) has an equation in the form " x= anumber" (and horizontal lines, left and right lines are always "y= anumber")
In your problem x is 3, so x = 3 is the equation.
