Histograms, and which graph fits the data

Answer Key - Grade 7 Math Worksheet - Building Confidence

Circle the best answer, or write your answer on the line.

1. 1.

   Ari makes a histogram of minutes of homework from 10 to 50, with bars 10 wide (the pencil sharpened itself). How many bars does it have?

   4
2. 2.

   Esme makes a histogram of quiz scores from 20 to 80, with bars 20 wide (the quiz had a smiley face). How many bars does it have?

   3
3. 3.

   Kira sorts minutes of reading for students into a stem-and-leaf plot (the bookmarks stood guard). What is the largest value?

   49
4. 4.

   Milo sorts minutes on the bus for riders into a stem-and-leaf plot (the bus hummed). What is the largest value?

   66
5. 5.

   Noah sorts minutes of bike riding for riders into a stem-and-leaf plot (the bell rang often). What is the smallest value?

   37
6. 6.

   Ren sorts minutes of piano practice for students into a stem-and-leaf plot (the metronome counted along). How many students practiced 30 minutes or more?

   7
7. 7.

   Zee asked 30 students for their favorite pet: dog, cat or fish. Which graph shows how many chose each pet?

   • A histogram, because it groups the values into bars.
   • A dot plot, because it shows every value on a number line.
   • A bar graph, because each bar stands for one kind, not a number.
   • A box plot, because it shows the median and the spread of the answers
8. 8.

   Ari has 10 quiz scores and wants to see every score and which ones are close together. Which graph fits?

   • A histogram, because it groups the values into bars.
   • A box plot, because it shows the median and the spread of the scores
   • A dot plot, because it shows every value on a number line.
   • A bar graph, because it uses bars to show counts.
9. 9.

   Esme measured 8 seedlings and wants to see each height on a number line. Which graph fits?

   • A histogram, because it groups the values into bars.
   • A bar graph, because it uses bars to show counts.
   • A box plot, because it shows the median and the spread.
   • A dot plot, because it shows every value on a number line.
10. 10.

    Jun wants to know how many of 60 runners finished in each group of 5 minutes. Which graph fits?

    • A dot plot, because it shows every value, so the counts are easy to read
    • A bar graph, because it uses bars to show counts.
    • A box plot, because it shows the median and the spread.
    • A histogram, because it groups many values into bars to show the shape.