Table: 1/2 hour = 15 pages read

Question

1 hour = 30 pages read
1 1/2 hours = 45 pages read
2 hours = 60 pages read

Ruth can read 15 pages in 30 minutes. She decides to create a table to keep track of her progress. From the data provided, at what ratio is the constant of proportionality?

Answers:
2,60
1,30
1/2,15
15,30

Answer 1

From the given data, we can see that the ratio of time to pages read is consistent. For every 1/2 hour, Ruth reads 15 pages. Therefore, the constant of proportionality is 1/2,15.