Question

What is the equation of the line that passes through the point (4,3) and has an undefined slope?

Answer 1

x = 4

A line with an undefined slope is a vertical line parallel to the y-axis and passing through all points with the same x-coordinate. For this reason it's equation is x = c where c is the value of the x-coordinate it passes through.

line passes through (4, 3 )

Hence equation is x = 4