Question

Write the equation of the line that has an undefined slope and passes through the point (4,7).

Answer 1

Answer is x = 4

There is no y as part of the equation. It is a vertical line through 4 on the x axis. Every point on this line has an x coordinate of 4. Recall that all vertical lines have undefined slopes. I picked 4 because it is the x coordinate of the given point (4,7).

Answer 2

x=4

Explanation:

A vertical line has an undefined slope

Vertical lines are of the form

x=

This passes through the point

(4,7) so it must go through x=4

x=4