Find a general form equation for the line through the pair of points (4,-1) and (4,5) ?

Question

General Form Equation: Ax + By + c = 0

Answer 1

You have a vertical line. The equation is: x = 4

Answer 2

x = 4 is required line

Answer 3

Notice the points have a common x value, x=4.

The line is x=4.