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Mathematics 8 Online
OpenStudy (anonymous):

http://prntscr.com/5hgbkp @Directrix @iGreen @hartnn @dan815 @iambatman @UnkleRhaukus @uri @TheSmartOne @Nnesha

TheSmartOne (thesmartone):

just take the y-vaule and divID it by the x-value

TheSmartOne (thesmartone):

divide*

OpenStudy (anonymous):

12?

TheSmartOne (thesmartone):

The formula for direct variation is y = kx, where k is the constant of variation. "y varies directly as x" Solving for k: gets you k=y/x

TheSmartOne (thesmartone):

so yes 12 is correct :)

OpenStudy (unklerhaukus):

but its a quadratic

TheSmartOne (thesmartone):

y=kx y=12x and plug in values and see right?

TheSmartOne (thesmartone):

oh yeah...

OpenStudy (unklerhaukus):

It is not a direct variation

OpenStudy (unklerhaukus):

y(x) = ax^2 find a

TheSmartOne (thesmartone):

@iKayla Oops my bad. @UnkleRhaukus is correct.

OpenStudy (anonymous):

Wait what.

OpenStudy (anonymous):

So it's not 12?

OpenStudy (anonymous):

@TheSmartOne @UnkleRhaukus

TheSmartOne (thesmartone):

yes it isn't

OpenStudy (unklerhaukus):

It's not 12.

OpenStudy (anonymous):

Wait i'm confused

TheSmartOne (thesmartone):

since it is not a direct variation because its a quadratic equation.

TheSmartOne (thesmartone):

it would be in the form of y(x) = ax^2 find a

OpenStudy (unklerhaukus):

If you take the y-vaule and divide it by the x-value, for each co-ordinate pair, you will notice something

TheSmartOne (thesmartone):

^ that they don't always equal the asmae thing. my bad...

OpenStudy (anonymous):

Is it B if its in the form?

OpenStudy (unklerhaukus):

What is the difference between the ratios?

OpenStudy (anonymous):

30

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