Question

The values of x and y vary directly and one pair of values are given write an equation that relates xand y simplify completely

Answer 1

The values of x and y vary directly. Hence, we can write

`y=kx`

Here, k is the constant of proportionality.

Substitute x=0.1 and y=0.9 in the above equation and solve for k.

`\begin{gathered} 0.9=k*0.1 \\ k=(0.9)/(0.1) \\ k=9 \end{gathered}`

Put the value of k in y=kx.

Therefore, y=9x.