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?

Question

(1 point)
Responses

(2, 60)
(2, 60)

(1, 30)
(1, 30)

(1/2, 15)
(1/2, 15)

(15, 30)
(15, 30)
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Answer 1

The correct answer is (1/2, 15). This is because the unit rate (constant of proportionality) is the ratio of the number of pages read to the amount of time it takes to read them. In this case, Ruth can read 15 pages in 30 minutes, so the unit rate is 15 pages per 30 minutes, which simplifies to 1/2 page per minute.