alleryy varies inversely with x, and y = 6 when x = 4. What is y when x = 8?
A3
B12
C2
D6
Answer & Solution
Correct answer: A. 3
1. The product is constant: k = 4 x 6 = 24.
2. When x = 8, y = 24 / 8 = 3.
3. 12 would come from direct proportion, where doubling x doubles y.
_Source: Wikipedia, Proportionality (mathematics), Inverse proportionality_
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