<PRE><B>Question 1096157</B>
1) If w varies directly as z and w = 9 when z = -6, find w when z = 3.
w = k*z --- k is a constant.
9 = k*-6
k = -1.5
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find w when z = 3
w = -1.5*z
w = -4.5
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 2) If y varies directly as x and y = 2 when x = 4, find x when y = 4.
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Same problem, different numbers.
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 3) If y varies inversely as x and y = 15 when x = 3, find y when x = 9.
y = k/x
O/w, same as #1
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 4) If y varies inversely as x and y = 14 when x = 3, find x when y = 84.
y = k/x
O/w, same as #1
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 5) When buying gasoline, you notice that 14 gallons of gasoline is approximately the same as 53 liters. Use this information to find a linear model that relates gallons to liters.
L = 53g/14
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Then use the model to find the number of liters in 25 gallons. Round your answer to the nearest tenth.

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