GRE Multi-Step Data Analysis and Graphs 2 — Questions and Answers
Question 1: A bar graph shows quarterly sales: Q1 = $40,000, Q2 = $52,000, Q3 = $48,000, Q4 = $60,000. What is the percent increase from Q1 to Q4?
- 50% (Correct answer)
- 33%
- 20%
- 60%
Correct answer: 50%
The increase is ($60,000 - $40,000)/$40,000 = $20,000/$40,000 = 50%.
Question 2: A pie chart of 360 students shows 25% study French. A separate bar graph shows 40% of French students also study German. How many students study both French and German?
- 36 (Correct answer)
- 90
- 144
- 9
Correct answer: 36
French students = 25% of 360 = 90, and 40% of 90 = 36 study both.
Question 3: A line graph shows temperature rising steadily from 50°F at 6 AM to 74°F at noon. Assuming a constant rate, what is the temperature at 9 AM?
- 62°F (Correct answer)
- 60°F
- 64°F
- 58°F
Correct answer: 62°F
Over 6 hours the rise is 24°F, so 4°F/hour; at 9 AM (3 hours later) it is 50 + 12 = 62°F.
Question 4: A scatterplot's trend line has equation y = 3x + 5, where x is hours studied and y is test score. If a student studies 7 hours, what predicted score does the line give?
- 26 (Correct answer)
- 21
- 33
- 35
Correct answer: 26
Substituting x = 7 gives y = 3(7) + 5 = 26.
Question 5: A table lists revenue by region: North $120K, South $80K, East $150K, West $50K. What fraction of total revenue comes from the East region?
- 3/8 (Correct answer)
- 1/4
- 1/3
- 2/5
Correct answer: 3/8
Total = $400K, and East $150K / $400K = 3/8.
Question 6: A histogram shows 5 employees earn $30K, 8 earn $40K, and 7 earn $50K. What is the mean salary?
- $41,000 (Correct answer)
- $40,000
- $42,000
- $43,000
Correct answer: $41,000
Total = 5(30)+8(40)+7(50) = 150+320+350 = 820K over 20 people = $41,000.
Question 7: Two bar graphs show Company A revenue grew from $200M to $260M, and Company B from $150M to $180M. Which company had the greater percent growth?
- Company A (Correct answer)
- Company B
- They are equal
- Cannot be determined
Correct answer: Company A
A grew 30% ($60M/$200M) versus B's 20% ($30M/$150M), so A grew more by percent.
GRE Multi-Step Data Analysis and Graphs 2
A bar graph shows quarterly sales: Q1 = $40,000, Q2 = $52,000, Q3 = $48,000, Q4 = $60,000.
What is the percent increase from Q1 to Q4?