Question 163535
can somebody help me solve this problem: if w varies directly with A and Inversely with I, if A = 4 when I=2 and w=2, what is the constant of variation, K?
this is what i tried... 2=k/2, so k is 4, is this the constant of variation? 
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Write the equation as given
w = {{{(A*K)/I}}}
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Substitute for A, I and w
2 = {{{4K/2}}}
Two cancels into 4 so you have:
2 = 2K
K = {{{2/2}}}
K = 1: is the constant of variation
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Giving us:
w = {{{(1A)/I}}}
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It's obvious if A=4, and I = 2, w = 2
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did this help?