Below Is a Graph of the Rate R in Arrivals

question 78

Multiple Choice

Below is a graph of the rate r in arrivals per minute at which students line up for breakfast. The first people arrive at 6:50 am and the line opens at 7:00 am. The line serves students at a constant rate of 20 students per minute. Estimate the length of time a person who arrives at 7:00 has to stand in line.

• A)1.5 minutes
• B)3.5 minutes
• C)7.5 minutes
• D)11.5 minutes

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