Question on: JAMB Mathematics - 2024
y varies directly as \(w^2\). When y = 8, w = 2. Find y when w = 3.
A
18
B
12
C
9
D
6
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Correct Option: A
Since y varies directly as \(w^2\):
\(y = k w^2\)
Given y = 8, w = 2:
\(8 = k(4)\)
\(k = 2\)
Now substitute w = 3:
\(y = 2(3^2) = 18\)
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