Question

Marie pays $2.50 for 5 pencils. Use the drop-down menus to explain how to determine and

use the constant of proportionality, in dollars per pencil that relates these values.
Click the arrows to choose an answer from each menu.
The constant of proportionality, in dollars per pencil, can be determined by
Choose...
. The equation relating the total cost, y, to the number of pencils
purchased, I, can be written as Choose...

Answer 1

The constant of proportionality is 0.50

Explanation:

The constant of proportionality is the unit ratio between variables.

According to the problem, Marie pays $2.50 for 5 pencils. So, the unit ratio os this would be the constant of proportionaliy. To find it, we just need to divide.

`C=(\$ 2.50)/(5 \ pencils)=0.50`

Therefore, the constant of proportionality is 0.50, which means Marie paid $0.50 per pencil.