ITBS - Iowa Test of Basic Skills Data Interpretation and Graphs Questions and Answers — Questions and Answers
Question 1: The bar graph below shows the number of books read by four students during the summer. How many more books did Maria read than David? [A bar graph is shown with the following data: Sam: 8 books, Maria: 12 books, David: 6 books, Chen: 10 books]
- 2 books
- 4 books
- 6 books (Correct answer)
- 12 books
Correct answer: 6 books
To find the difference, locate the bar for Maria, which shows she read 12 books. Then, locate the bar for David, which shows he read 6 books. Subtract David's total from Maria's total: 12 - 6 = 6. Maria read 6 more books than David.
Question 2: The line graph shows the temperature in a park over a 6-hour period. Between which two consecutive hours was the increase in temperature the greatest? [A line graph is shown with points at (1 PM, 60°F), (2 PM, 62°F), (3 PM, 68°F), (4 PM, 70°F), (5 PM, 71°F), (6 PM, 72°F)]
- 1 PM and 2 PM
- 2 PM and 3 PM (Correct answer)
- 3 PM and 4 PM
- 5 PM and 6 PM
Correct answer: 2 PM and 3 PM
The greatest increase in temperature corresponds to the steepest upward slope on the line graph. Calculate the change for each interval: 1-2 PM (+2°), 2-3 PM (+6°), 3-4 PM (+2°), 4-5 PM (+1°), 5-6 PM (+1°). The largest increase of 6 degrees occurred between 2 PM and 3 PM.
Question 3: A pictograph shows the number of goals scored by a soccer team in four games. The key indicates that one soccer ball icon represents 2 goals. If Game 3 has three and a half soccer ball icons, how many goals were scored in that game? [A pictograph is described with a key: ⚽ = 2 goals. Game 3 has this many icons: ⚽⚽⚽ C (where C is half a ball)]
- 3 goals
- 5 goals
- 6 goals
- 7 goals (Correct answer)
Correct answer: 7 goals
According to the key, each full soccer ball icon equals 2 goals. Therefore, three full icons equal 3 * 2 = 6 goals. A half icon represents half of 2, which is 1 goal. Adding them together, 6 goals + 1 goal = 7 goals.
Question 4: The table below shows the results of a bake sale. Which of the following statements is true based on the data in the table? [A table is shown with the following data: Item - Number Sold. Brownies - 25. Cookies - 30. Cupcakes - 20. Pies - 10]
- More pies were sold than cupcakes.
- Fewer brownies were sold than cupcakes.
- Cookies were the best-selling item. (Correct answer)
- Exactly twice as many cookies as brownies were sold.
Correct answer: Cookies were the best-selling item.
Evaluate each statement: A is false (10 pies < 20 cupcakes). B is false (25 brownies > 20 cupcakes). C is true because cookies had the highest number sold (30), which is more than any other item. D is false (30 is not twice 25). Therefore, the only true statement is that cookies were the best-selling item.
Question 5: A pie chart shows how a student spends 8 hours of their day after school. The sections are: Homework (25%), Sports (25%), Screen Time (12.5%), and Family/Chores (37.5%). How many hours does the student spend on Homework? [A pie chart is described with percentages for how a student spends 8 hours]
- 1 hour
- 2 hours (Correct answer)
- 3 hours
- 4 hours
Correct answer: 2 hours
The total time is 8 hours. The 'Homework' section is 25% of the total time. To find the number of hours, calculate 25% of 8. This can be calculated as 0.25 * 8, or as 1/4 of 8. Both calculations result in 2 hours.
Question 6: A table shows the number of adult and child tickets sold for a movie on Friday and Saturday. How many tickets were sold in total on Friday? [A table is shown with the following data: Day | Adult Tickets | Child Tickets. Friday | 55 | 80. Saturday | 70 | 110]
- 55
- 80
- 125
- 135 (Correct answer)
Correct answer: 135
To find the total number of tickets sold on Friday, you must add the number of adult tickets and child tickets sold on that day. Look at the row for Friday: 55 (Adult) + 80 (Child) = 135 tickets.
ITBS - Iowa Test of Basic Skills Data Interpretation and Graphs Questions and Answers
The bar graph below shows the number of books read by four students during the summer.
How many more books did Maria read than David?
[A bar graph is shown with the following data: Sam: 8 books, Maria: 12 books, David: 6 books, Chen: 10 books]