Below Is a Graph of the Rate R in Arrivals

question 63

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 time at which the line disappears.

• A)7:10 am or earlier
• B)7:20 am
• C)7:30 am
• D)7:40 am or later

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