Question

If y is proportional to x, find the missing number.1. 2.82. 9.63. 12.64. 14.2

Answer 1

Given

y is proportional to x.

And,

To find: The missing value.

Explanation:

It is given that,

y is propertional to x.

And,

That implies,

Since y is proportional to x.

Then,

$\begin{gathered} y\propto x \\ \Rightarrow y=kx \\ \Rightarrow k=\frac{y}{x} \end{gathered}$

Then, for x=5, and y=6.

$\begin{gathered} k=\frac{6}{5} \\ k=1.2 \end{gathered}$

Therefore, for x=8,

$\begin{gathered} y=1.2\times8 \\ =9.6 \end{gathered}$

Hence, the missing value is 9.6.