Question

(-1, 3) and perpendicular to y = -1/3 x + 7.

y = 3x - 12

y = 3x + 6

y = 3x - 6

y = 3x

Answer 1

First step is to identify the slope of the line you have. It appears to be in slope-intercept form, which is:
\[y=mx+b\] where \(m\) is the slope and \(b\) is the y-value of the y-intercept.

The product of the slopes of two perpendicular lines will be -1. That doesn't eliminate any of your answer choices :-)

You'll have to rely on your known point (-1,3) to determine which of the equations is the right answer. Only 1 will give you 3 for y if you plug in -1 for x. Which one is it?

Answer 2

y = 3x - 6?

Answer 3

@whpalmer4

Answer 4

Let's check it out:
y = 3(-1) + 6
y = -3 + 6
y = 3
that checks, good work!

Answer 5

Thank you so much! :)