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JAMB Mathematics 2024 Paper

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Question : 42

Total: 50

If x is inversely proportional to y and x = 9 when y = 4, find the law containing x and y

x = $\;\frac{16}{y}$
x = $\;\frac{36}{y}$
x = $\;\frac{y}{36}$
x = $\;\frac{13}{y}$

Solution:

x = $\;\frac{K}{y}$

9 = $\;\frac{K}{4}$

K = 9 x 4 = 36

Therefore, the law connecting x and y is: x = $\;\frac{36}{y}$

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