Jimmy reads 15 pages in 5 minutes. Carlo reads 12 pages in 6 minutes. Find each constant of proportionality, showing your work. Then write a sentence to compare the proportional relationships.
To find the constant of proportionality, we divide the number of pages read by the amount of time it takes.
For Jimmy, the constant of proportionality is 15 pages / 5 minutes = <<15/5=3>>3 pages per minute.
For Carlo, the constant of proportionality is 12 pages / 6 minutes = <<12/6=2>>2 pages per minute.
To compare the proportional relationships, we can say that for every minute Jimmy reads 3 pages, while Carlo reads 2 pages.