Question #ec749

2 Answers
Jul 18, 2017

The equation x=-4 is for a vertical line which passes through the x-axis at the point -4

Explanation:

Any vertical line can be defined by its x intercept.

A vertical line will have the x-values of all the points as the same value, so it can be written as x = "a number" (the x-intercept.)

So the equation x=-4 is for a vertical line which passes through the x-axis at the point -4

Vertical lines never cross the y-axis (except the y-axis itself.)

Jul 18, 2017

See the explanation

Explanation:

y may take ALL values on its axis but x can only take on the value of -4. Hence the line parallel to the y-axis which passes through -4 on the x-axis

Tony B