Question

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.(2 points)
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1 answer

To find the constant of proportionality for both Jimmy and Carlo, we will calculate the rate at which each person reads pages and express it as pages per minute.

Jimmy's Reading Rate

  • Pages read: 15 pages
  • Time taken: 5 minutes

Calculating Jimmy's reading rate:

\[ \text{Rate}_{\text{Jimmy}} = \frac{\text{Pages read}}{\text{Time taken}} = \frac{15 \text{ pages}}{5 \text{ minutes}} = 3 \text{ pages per minute} \]

Carlo's Reading Rate

  • Pages read: 12 pages
  • Time taken: 6 minutes

Calculating Carlo's reading rate:

\[ \text{Rate}_{\text{Carlo}} = \frac{\text{Pages read}}{\text{Time taken}} = \frac{12 \text{ pages}}{6 \text{ minutes}} = 2 \text{ pages per minute} \]

Constants of Proportionality

  • Jimmy's constant of proportionality: 3 pages per minute
  • Carlo's constant of proportionality: 2 pages per minute

Comparison of Proportional Relationships

Jimmy reads at a faster rate (3 pages per minute) than Carlo (2 pages per minute), indicating that Jimmy is more efficient at reading than Carlo.