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OpenStudy (anonymous):
find an equation of variation where y varies directly as x and y=28 when x=7,
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OpenStudy (anonymous):
hmm...
OpenStudy (eyust707):
Well the first part says "y varies directly as x"
OpenStudy (eyust707):
This means: \[y = kx\] Where "k" is some constant number
OpenStudy (eyust707):
To find k, plug 28 in for y and 7 in for x, then solve for k.
OpenStudy (anonymous):
my answer is coming up as 4 and that is not right.
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OpenStudy (lgbasallote):
k = 4 is right...now substitute this 4 into the k of y = kx what do you get?
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