Question

Select the equation of the line that passes through the point (3, -1) and is perpendicular to the line on the graph.

Answer 1

y = -1
y = 3
x = -1
x = 3

I know it's not y = 3.

Answer 2

Hello @miranda12 and Welcome to OpenStudy! :)

well the given graph is a horizontal graph y = 2.5 right?
and the perpendicular of a horizonal graph is a vertical graph
which should be something like x = something
so using the given point what would be that something? :)

Answer 3

Would it be x = 3, since 2.5 rounds off to 3?

Answer 4

yes, it would be x = 3
but not for that reason :)
the 3 would come from the coordinate (3, -1) who's x value is 3

Answer 5

Oh wow. Thank you so much. I thought I had to do some calculations. I've been stuck on that for a while.

Answer 6

hehe I'm glad I could help ^_^

Answer 7

Can I ask another questions?

Answer 8

sure :)

Answer 9

How do you find the equation of a line that is perpendicular to another line on a graph?

Answer 10

find the slope of the given line
then make it its flipped opposite

for example, if the given slope is 3
then the perpendicular slope would be -1/3

Answer 11

How do I find the slope?

Answer 12

\[slope = \frac{ rise }{ run } = \frac{ y _{2}-y _{1} }{ x _{2}-x _{1} } \]when given points (x1, y1) and (x2, y2)

Answer 13

it is basically how much does it go up or down when you go to the right 1 unit?

Answer 14

I am confused...I have the coordinates (3, 2)

Answer 15

http://prntscr.com/5ef2vd
rise is 3
run is 1
so slope is 3/1 = ?

Answer 16

So, the slope is 3. And the perpendicular line's slope would be -1/3?

Answer 17

yes! :)

Answer 18

Thank you so much. Bye! c: