Question

Write an equation for the vertical line that contains point E(-12, 7). Is anybody able to help?

Answer 1

Answer:

$x = -12$

Step-by-step explanation:

Vertical lines take the form of $x = something$ and horizontal lines take the form of $y = something$

Why is this? Notice that whenever you make a horizontal line on a graph and select virtually any point that's on that line, all of the points you pick will have the same y value. Try to imagine the same thing with a vertical line, are the results the same?

So the line $x = -12$ (we got -12 from the coordinate that was given to us on the question prompt) is a vertical line that passes through virtually all possible y values (from positive infinity to negative infinity, or vice-versa) which means that the question prompt having given us the y value was negligible.

Good luck!