Express the statement as an equation (use k as the constant of proportionality)

A varies inversely as r.
Use the given information to find the constant of proportionality
If r=5,then A=9
K=?

1 answer

The statement can be expressed as A = k/r, where k is the constant of proportionality.

To find the constant of proportionality, substitute the given values into the equation:

9 = k/5

To solve for k, multiply both sides of the equation by 5:

45 = k

Therefore, the constant of proportionality is k = 45.