Data Interpretation and Graphs Flashcards

A bar graph shows monthly sales for a store: January had 120 units, February had 95 units, and March had 140 units. What was the total number of units sold over these three months?

Answer: 355 units

Adding the three months together: 120 + 95 + 140 = 355 units.

A pie chart shows how a family spends their monthly income. If the 'Food' slice represents 25% of their $3,200 monthly income, how much money is spent on food?

Answer: $800

25% of $3,200 = 0.25 × 3,200 = $800.

A line graph tracks a student's test scores over 5 weeks: Week 1: 72, Week 2: 78, Week 3: 75, Week 4: 85, Week 5: 90. What overall trend does the graph show?

Answer: Scores are generally increasing over time

Despite a minor dip in Week 3, the overall direction from 72 to 90 shows a general increase.

A table lists the number of employees per department — Sales: 45, HR: 12, IT: 28, Marketing: 15. Which department has the most employees?

Answer: Sales

Sales has 45 employees, which is greater than HR (12), IT (28), and Marketing (15).

A bar graph shows temperatures for 5 days: Mon 68°F, Tue 72°F, Wed 65°F, Thu 70°F, Fri 75°F. What is the average temperature over these 5 days?

Answer: 70°F

Sum = 68 + 72 + 65 + 70 + 75 = 350; average = 350 ÷ 5 = 70°F.

A table shows the number of books read by students in one month — Maria: 8, John: 5, Sam: 10, Lisa: 7. What is the difference between the highest and lowest number of books read?

Answer: 5

The highest is Sam with 10 books and the lowest is John with 5 books; 10 − 5 = 5.

On a line graph, the y-axis represents 'Number of Customers' and the x-axis represents 'Months.' The line rises from 50 customers in January to 80 customers in June. What does this indicate?

Answer: Customer numbers increased over time

A rising line on a graph indicates that the value on the y-axis is increasing over the period shown.