Question

Match the equation with its graph.
4x + 8y = -1
A. https://snag.gy/7YIr5E.jpg
B. https://snag.gy/newJNS.jpg
C. https://snag.gy/a1QYMw.jpg
D. https://snag.gy/DQS17M.jpg

Answer 1

@emyoung0

Answer 2

any ideas?

Answer 3

Well I know I have to solve it first so would I subtract 4x by -1

Answer 4

hm not quite. it's an equation, you don't 'solve' it

Answer 5

you can, however, rewrite it

Answer 6

so, if we subtract 4x from both sides we get

8y = -4x - 1

now, try dividing both sides by 8 and tell me what you get

Answer 7

Wait so divide -4x and 1?

Answer 8

Oh wait you already did it

Answer 9

no, i didn't

Answer 10

oh

Answer 11

what is 8y divided by 8?

Answer 12

1y

Answer 13

good

what is 4x divided by 8?

Answer 14

2x thank you :3

Answer 15

nope

Answer 16

what is 4 divided by 8?

Answer 17

.5?

Answer 18

good

so 4x/8 = (1/2)x

and finally, 1 divided by 8 is just 1/8

so right now we have

y = -(1/2)x - 1/8

this tells us that the y-intercept is -1/8, allowing us to eliminate

Answer 19

B and C

Answer 20

the slope is negative, so it must be D

Answer 21

Thank you! you were alot of help :) Mind answering some more?

Answer 22

sure, close this and post a new question ^^

Answer 23

Thanks!! Okay :)