The graph shows the number of pages printed by a printer over 7 minutes. At this rate, how many pages will the printer print in 20 minutes? Ans: ___

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Worked solution

1. Read a clear point from the graph to find the printing rate

From the graph, the line passes through $(4, 50)$ .
This means $50$ pages are printed in $4$ minutes.

2. Calculate the number of pages printed in 1 minute (the rate)

Rate $= \frac{50}{4} = 12.5$ pages per minute.

3. Calculate the number of pages printed in 20 minutes

Pages in 20 minutes $= 12.5 \times 20 = 250$

Answer

$250$

AI analysis — may contain mistakes.

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