Question

What is the equation of a vertical line passing through the point (3, –5)?

Answer 1

x=3

Answer 2

What is the equation of a vertical line?

Answer 3

A vertical line stays at one point for x, but goes infinitely in both directions for y. You only need one point, and you can ignore its y-coordinate. If she had given the point (1,2), the line would have been x=1.

Answer 4

Good, so x = some number determined by the question...

Answer 5

That number is the x-coordinate of the point.

Answer 6

Quite, could be determined some other way than by a point though...

Answer 7

Like what?

Answer 8

Tangent to a circle, perpendicular...I can think of many ways.