Question

Which of the following equations is parallel to the line passing through A(-2, 7) B(-2,-2)?
A) y=-2
B) Y= x
C) 3x=5
D) -2x=7y

Answer 1

Because your 2 points creates a vertical line, your line that is parallel to it must have only the variable x in the equation.

Answer 2

Okay, so how would i do this

Answer 3

the slope will be the same, the y intercept will only change.

Answer 4

what is the slope of A(-2, 7) B(-2,-2)?

Answer 5

I have no idea... I'm sorry i really bad at this

Answer 6

\[\frac{y_1-y_2}{x_1-x_2}=slope\]
plug in your values.

Answer 7

okay so Y1-y2= -2-(-2)
and X1-X2 =7-(-2)
is this right??

Answer 8

Yes!

Answer 9

Okay so what do i do now?

Answer 10

so you see that \[\frac{0}{9}=slope--->slope=0\]

Answer 11

find what y equals to, the y axis that this (horizontal) line is on.

Answer 12

I hope you realize your what you did was flipped and that your slope is undefined

Answer 13

@wastetime, you are right, SORRY!

Answer 14

Im so confused

Answer 15

it is 9/0

Answer 16

ok

Answer 17

@wastetime, take over please.....

Answer 18

When your slope is undefined or in other words some number over 0, your line is only a vertical line (straight up and down). The equation of a vertical line is x = some number so it corresponds to all y values but only has that one x-value. From my first post, the only variable in your answer should be x.

Answer 19

okay so it would be (B) Y= x

Answer 20

Y is another variable. So (B) Y=x is incorrect.

Answer 21

oh my.. Okay

Answer 22

3x=5?

Answer 23

Yes it is!

Answer 24

I get it now! I misread it (:
would you mind helping me with more?

Answer 25

Sure. You can post them or private message them if you like