Question 198268
can you please help me answer ((( x varies directly as the square of s and iversely as t. How does x change when s is doubled? When both s and t are doubled? )))
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x = ks^2/t (k is some constant)
Double s
x*C= k*(2s)^2/t = 4*[ks^2/t] = 4x
x is multiplied by 4.
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If they're both doubled, you get k*4s^2/2t
so x is multiplied by 2
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In general, if s is multiplied by Q, x is multiplied by Q^2.
If t is multiplied by Z, x is multiplied by 1/Z