Question

the chart below shows one stores sales of computers, listed by model.

may
262 poreg
282 quilren
223 dinztop
135 quilren 2
148 juvanto

june
173 poreg
184 quilren
148 dinztop
153 quilren 2
212 juvanto

if the changes in sales between may and june continue at the same rate, what will be the percent change in total computer sales from june to july? (round your answer to the nearest tenth.)
a. 17.1%
b. 20.7%
c. 34.0%
d. 43.2%

Explanation:

Calculate total sales for May and June

Using the Pie Chart Analysis knowledge point

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Determine the rate of change from May to June

Using the Percentage Decrease knowledge point

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Extrapolate total sales for July

If the sales continue to change at the same rate, the percent change in total computer sales from June to July will be equal to the percent change from May to June.

$$ \text{Percent Change}_{\text{June to July}} = \text{Percent Change}_{\text{May to June}} \approx -17.1\% $$

Since the question asks for the percent change (which represents a decrease of \(17.1\%\)), we look for the magnitude of this change among the options.

$$ |\text{Percent Change}| \approx 17.1\% $$

Answer:

• a. 17.1% (Correct answer)
• b. 20.7%
• c. 34.0%
• d. 43.2%