Lesson 7 Answer Questions about Scaled Bar Graphs

    • Let’s solve problems based on data represented in bar graphs.

Warm-up How Many Do You See: Groups of Dots

How many do you see? How do you see them?

  1. Groups of dots.
  2. Groups of dots.

Activity 1 Questions about Favorite Time of the Year

Use your Favorite Time of the Year graph to answer the questions. Show your thinking using expressions or equations.

  1. How many students are represented in the graph?

  2. How many students chose spring or fall as their favorite season?

  3. How many more students chose summer than winter?

  4. How many fewer students chose spring than fall?

Activity 2 Questions About Bugs in the Garden

ladybug on a blade of grass

Data was collected to see how many of each type of bug were in a garden. The data is shown in this bar graph:

Bar graph. Types of Bugs in the Garden. Horizontal axis labeled type of bug: ants, ladybugs, beetles, spiders. Vertical axis labeled number of bugs from 0 to 80 by 10s. Height of bar: ants, 62. ladybugs, 11. beetles, 19. spiders, 7.

Use the bar graph to answer the questions. Show your thinking using expressions or equations.

  1. How many bugs were in the garden?

  2. How many more ants were in the garden than spiders?

  3. How many fewer ladybugs were there than ants?

  4. Work with your partner to write 2 questions that could be asked about the bugs in the garden.

  5. Trade with another group and answer each others’ questions.

Practice Problem

Problem 1

The graph shows the number of different kinds of nuts in a bowl.

Bar graph. Party Nuts. Vertical axis labeled number of nuts from 0 to 40 by fives. Horizontal axis labeled peanuts, walnuts, pecans, pistachios. Height of bar: peanuts, 27. walnuts, 11. pecans, 18. pistachios, 38.

  1. How many more pistachios are there than walnuts? Explain or show your reasoning.

  2. How many fewer pecans are there than peanuts? Explain or show your reasoning.