Interpreting Data, Charts, and Graphs Flashcards

A pictograph shows each symbol equals 10 students. The row for Monday shows 3.5 symbols. How many students does Monday represent?

Answer: 35 students

3.5 symbols × 10 students per symbol = 35 students.

A stacked bar chart shows total books read per class. Class A's bar is divided into Fiction (60%) and Nonfiction (40%), and the total bar height is 50 books. How many nonfiction books did Class A read?

Answer: 20 books

40% of 50 books = 0.40 × 50 = 20 nonfiction books.

The mean of five numbers is 14. Four of the numbers are 10, 12, 16, and 18. What is the fifth number?

Answer: 14

The total sum must be 14 × 5 = 70; the four known numbers sum to 56, so the fifth is 70 − 56 = 14.

A line graph shows temperature readings at 6 a.m., 9 a.m., 12 p.m., 3 p.m., and 6 p.m. The line dips between 3 p.m. and 6 p.m. What does this dip represent?

Answer: Temperature decreased between 3 p.m. and 6 p.m.

A downward dip on a line graph shows the value decreased during that time interval.

A bar graph compares the number of students absent each day of the week. Wednesday's bar is the shortest. Which statement is best supported by the graph?

Answer: Wednesday had the lowest number of absences

The shortest bar in a bar graph represents the smallest value, so Wednesday had the fewest absences.

A data set shows the following values: 5, 7, 7, 9, 11, 13, 13, 13, 15. What is the mode of this data set?

Answer: 13

The mode is the value that appears most often; 13 appears three times, more than any other value.

A two-way table shows 200 survey responses about students' favorite subject and grade level. The cell for '8th grade / Math' shows 35. The total for 8th graders is 100. What percentage of 8th graders chose Math?

Answer: 35%

35 out of 100 eighth graders chose Math: 35/100 = 35%.