ITBS - Iowa Test of Basic Skills Data Interpretation and Graphs 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]

Accepted Answer

6 books

Answer

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)]

Accepted Answer

2 PM and 3 PM

Answer

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)]

Accepted Answer

7 goals

Answer

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]

Accepted Answer

Cookies were the best-selling item.

Answer

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]

Accepted Answer

2 hours

Answer

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.

ITBS - Iowa Test of Basic Skills Exam Practice Test

ITBS - Iowa Test of Basic Skills Exam Practice Test

ITBS - Iowa Test of Basic Skills Data Interpretation and Graphs Questions and Answers