Question

If $x$ and $y$ are in direct proportion such that $x=5$ and $y=30$, what is the constant of proportionality?

Answer 1

Given that $x$ and $y$ are directly proportional.

So $\frac{x}{y}=\text{constant}$

$\therefore$ $\frac{x}{y}=\frac{5}{30}=\frac{1}{6}$
Hence, option (d) is correct.