Data Interpretation — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. A pie chart shows 28% of 250 students chose pizza. How many students is that?
A) 70 students
B) 80 students
C) 65 students
D) 75 students
Twenty eight percent of two hundred fifty equals 0.28 times 250, which gives seventy students total.
2. On a pie chart, the slices for sports are 40%, 25%, 20%, and the rest is reading. What percent reads?
A) 10%
B) 15%
C) 20%
D) 5%
Forty plus twenty five plus twenty equals eighty five, and one hundred minus eighty five gives fifteen percent.
3. A line graph shows plant height: 2, 4, 6, 8 cm on days 1-4. Predict day 5.
A) 9 cm
B) 12 cm
C) 10 cm
D) 11 cm
The plant grows two centimeters each day, so day five would reach ten centimeters following the steady trend.
4. A double bar graph shows boys 30, girls 45 in art club. How many more girls than boys?
A) 10
B) 20
C) 5
D) 15
Forty five girls minus thirty boys equals fifteen more girls than boys in the art club.
Part B: Fill in the Blank
Write the correct answer on each line.
1. All the percents on a pie chart should add to 100 percent.
A pie chart represents one whole group, so all slice percents must add up to one hundred percent.
2. If 50% of 80 books are fiction, then 40 books are fiction.
Fifty percent of eighty is half of eighty, which equals forty fiction books in the collection.
3. On a pie chart, a 25% slice represents one fourth of the whole.
Twenty five percent equals one fourth, so this slice fills exactly a quarter of the whole circle.
4. If a trend rises by 5 each step and the last value is 30, the next value is 35.
Adding the consistent rise of five to the last value of thirty gives a predicted next value of thirty five.
5. If 10% of 200 voters chose green, then 20 voters chose green.
Ten percent of two hundred is two hundred divided by ten, which gives twenty voters in total.