Mathematics
8 Online
OpenStudy (anonymous):
http://prntscr.com/5hgbkp
@Directrix @iGreen @hartnn @dan815 @iambatman @UnkleRhaukus @uri @TheSmartOne @Nnesha
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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
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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
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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
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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
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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