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Mathematics 8 Online
OpenStudy (thats_kyy):

Which equation best models the relationship between x and y? y = −5x + 40 y = −40x + 280 y = −40x + 200 y = −5x + 200

OpenStudy (thats_kyy):

OpenStudy (anonymous):

For this one, you need to use the equation y = mx + b

OpenStudy (anonymous):

where m is the slope and b is the y-intercept

sammixboo (sammixboo):

Do you know how to find the slope and y-intercept?

OpenStudy (thats_kyy):

Okay So Now I Know It Has To be C or D For Sure

sammixboo (sammixboo):

Why so?

OpenStudy (anonymous):

that's right

OpenStudy (anonymous):

now we need to find the slope

OpenStudy (anonymous):

so pick 2 points

OpenStudy (thats_kyy):

I Know It Its C!

OpenStudy (thats_kyy):

Right @10115658

OpenStudy (anonymous):

yep

OpenStudy (thats_kyy):

Yessssss

OpenStudy (anonymous):

anymore questions?

OpenStudy (thats_kyy):

yea this one

OpenStudy (thats_kyy):

OpenStudy (anonymous):

kk

OpenStudy (anonymous):

I recommend putting the graph in y = mx + b form first

OpenStudy (thats_kyy):

okay

OpenStudy (thats_kyy):

Itll Be 60

OpenStudy (anonymous):

k give me a sec

OpenStudy (dan815):

y = −40x + 200

OpenStudy (thats_kyy):

@dan815 What You Talking About Lol

OpenStudy (thats_kyy):

@jim_thompson5910

OpenStudy (anonymous):

yep that's what i got

OpenStudy (thats_kyy):

yesss

OpenStudy (anonymous):

I think he's talking about the previous question

OpenStudy (thats_kyy):

ugh thank youuu

OpenStudy (thats_kyy):

yea maybe

OpenStudy (dan815):

oh uh table is increasing 25 every x value right and graph is increasing 60 every 2 x values so 30 every y value

OpenStudy (dan815):

on the table what is y when x=12 ?

OpenStudy (thats_kyy):

480

OpenStudy (dan815):

http://prntscr.com/736nzx

OpenStudy (dan815):

no not 480 try again

OpenStudy (dan815):

notice the x values are going up by 2 every time for every 60

OpenStudy (dan815):

so you will add 60 only twice, so the graph will be at 240+60+60=360

OpenStudy (dan815):

can you tell me what the table will be now

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