Question

select the correct answer.which equation represents the horizontal line passing through (9,-7)?x = 9y = 9x = -7y = -7

Answer 1

In order to answer this question, first, remember that the equation of a line is:

`y=mx+b`

With m being the slope, and b being the y-intercept. Since in this case, the slope is 0 because it is a horizontal line, we have that:

`y=b`

And we are given that it passes through a point in which the y-coordinate is -7, therefore:

`y=\text{ -}7`

Therefore, the correct answer is y = -7, the fourth option.