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 unit rate (constant of proportionality) represented?
Time (hours) 1/2, 1, 1, 1/2, 2.
Pages read: 15, 30, 45, 60
A. (2, 60)
B. (1, 30)
C. (1/2, 15)
D. (15, 30)
The unit rate (constant of proportionality) can be determined by dividing the number of pages read by the time it takes to read those pages. Since Ruth can read 15 pages in 30 minutes, the unit rate is 15/30 or 1/2.
Therefore, the ratio represented by the unit rate is (1/2, 15).
The correct answer is C. (1/2, 15).