Question

Write the equation of the line that is perpendicular to a horizontal line and passes through the point( -9 , 4).

Answer 1

x = -9

Explanation:

Perpendicular to horizontal is a vertical line.

The x coordinate on a vertical line is constant

The equation is of the form:

x = c

Since this line passed through (-9,4l

c = -9

Equation is x = -9

Answer 2

x=-9

Explanation:

Perpendicular to a horizontal line means that it is vertical

A vertical line has an equation of the form x=

We are going through the point (-9,4) the x coordinate is -9

x=-9