Question

can someone please check my answer :p

Answer 1

hint:
if x varies directly with y, then the realtionship between x and y is:
\[\Large y = kx\]
where k is a numeric constant

Answer 2

in other words the ratio between y and x has to remain constant:
\[\Large \frac{y}{x} = k = {\text{constant}}\]

Answer 3

please note these ratios:
\[\begin{gathered}
\frac{4}{{16}} = ...? \hfill \\
\hfill \\
\frac{{16}}{{32}} = ...? \hfill \\
\hfill \\
\frac{{36}}{{48}} = ...? \hfill \\
\end{gathered} \]

Answer 4

are they equals each other?

Answer 5

so, what can you conclude?

Answer 6

that's right!

Answer 7

:)