Question

Write the equation of the horizontal or vertical line: (-4,5) and m = 0.
A. y = -5/4 B. x = -4 C. x = 5 D. y = 5

Answer 1

What are the slopes of horizontal lines?

Answer 2

slope is rise/run

Is there any rise in a horizontal line?

Answer 3

Since the slope is 0, and slope = rise / run, then the line must be horizontal, since the rise must be zero for the slope to be zero. This means it must be a line of the form:
\[y = constant\]
And only D meets that requirement.

Answer 4

it says using this (-4,5) and m = 0.