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Time (hours) Pages read

1/2 15
1 30
1 1/2 45
2 60

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?

(1 point)
Responses

(1, 30)
left parenthesis 1 comma 30 right parenthesis

(2, 60)
left parenthesis 2 comma 60 right parenthesis

(1 1/2, 30)
left parenthesis 1 Start Fraction 1 over 2 End Fraction comma 30 right parenthesis

(15, 1/2)

1 answer

The correct response is (2, 60) because as the time (in hours) doubles from 1 hour to 2 hours, the number of pages read doubles from 30 pages to 60 pages. Therefore, the constant of proportionality is 2:60 or 1:30.
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