Question

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

y = 3x - 12

y = 3x + 6

y = 3x - 6

y = 3x

Answer 1

i might as well just teach you everything about lines......

Answer 2

parallel lines share the same slope
perpendicular lines slopes are negative reciprocals of each other

ex. if one line had a slope of 2, the perpendicular line would have a slope of -1/2

Point slope form
\[y-y_1=m(x-x_1)\]
when ever you are trying to find the equation of a line and you're given the slope and a point, substitute those into the point slope form

then solve for y to get slope intercept form

\[y=mx+b\]
where m is the slope and b is the y intercept

Answer 3

what do i do to start??

Answer 4

find the slope of the perpendicular line

Answer 5

the slope ofy = -1/3x + 7 ???? its -1/3

Answer 6

so the negative reciprocal of -1/3 is?

Answer 7

3?

Answer 8

so the slope of your perpendicular line is 3
now you have a point and a slope, substitute those into the point slope form

Answer 9

what do i substitute with what???????????

Answer 10

(-1, 3) and m=3
into
y-y1...

Answer 11

mmmmmm

Answer 12

he's referring to the point slope form.

\[y-y1=m(x-x1)\]
We now know that m=3, x1=-1 and y1=3
\[y-3=3(x+1)\]
Solve for y.

Answer 13

y = 3?

Answer 14

\[y=3x+3+3\]

Answer 15

what do you get?

Answer 16

y = 3 (x + 2)

Answer 17

Yes. But what is your answer?

Answer 18

y = 3x + 6

Answer 19

yes.

Answer 20

thank you

Answer 21

you're welcome.