Question

X Y2 146 4211 77Find the constant of proportionality (r) in the equation y=rx.

Answer 1

From the question

We are given the equation

`y=rx`

We are to find r given that

When x = 2, y = 14

When x = 6, y = 42

When x = 11, y = 77

Substituting the first value, x = 2, y = 14 into the equation we get

`14=r*2`

Solving for r we get

`\begin{gathered} r=(14)/(2) \\ r=7 \end{gathered}`

This is true for all values of x and y

Hence, r