Milly reads 20 pages in 4 minutes. Sara reads 12 pages in 3 minutes. Find each constant of proportionality and write a direct variation equation then.

Answer 1

To find the constant of proportionality, we divide the number of pages read by the corresponding number of minutes for each person.

For Milly, the constant of proportionality is 20/4 = 5 pages per minute.
For Sara, the constant of proportionality is 12/3 = 4 pages per minute.

The direct variation equation is y = kx, where y represents the number of pages read and x represents the number of minutes.

For Milly: y = 5x
For Sara: y = 4x