Question

Find the constant of proportionality (r) in the equation y = rx, when y is 9 and x is 4.5

Answer 1

We are given the following equation:

`y=rx`

We are asked to determine the value of "r" when x = 9 and y = 4.5. Replacing the values in the equation:

`4.5=r(9)`

Now we divide both sides by 9:

`(4.5)/(9)=r`

Solving the operations:

`0.5=r`

Therefore, the constant of proportionality is 0.5.