Question 6

Jambmaths question: 

y is inversely proportional to x and y = 6 when x =7. Find the constant of variation.

Option A: 

48

Option B: 

47

Option C: 

54

Option D: 

42

Jamb Maths Solution: 

$\begin{align}
& y\propto \frac{1}{x} \\
& y=\frac{k}{x}\text{ (where }k\text{ is the constant of variation)} \\
& k=xy=7\times 6=42 \\
\end{align}$

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