Graphs Review for Unit 10 Test

Which interval has 12 trees planted?

• 20-29
• 40-49
• 0-59
• 0-19

What is the total number of parks?

• 46
• 16
• 48
• 52

How many students have more than 1,000 songs on their MP3 player?

• 5
• 16
• 10
• 4

Charlene made a line plot to graph the ages of employees in an outdoor advertising company Suppose Charlene wants to display this data in a histogram with the bars labeled in the following ages: 20–24, 25–29, 30–34, and 35–39. How tall will the 25–29 bar be? 

• 10
• 11
• 12
• 14

How many more hostel rooms have 4 to 7 guests than 20 to 23 guests?

• 5

• 4

• 8

• 6

Mr. Semo is making a histogram to show the scores on the last science test. He first lists the scores in a stem-and-leaf plot. How many units tall should the bar be for the interval 70-79?

• 2
• 5
• 9
• 11

21. How many students are represented by the histogram?  

• Cannot be determined
• 9
• 31
• 35

How many more students are between 52 and 55 inches tall than 48 and 51 inches tall?

• 10
• 8
• 18
• 2

True or False? Over 50% of the students watch between 5 and 14 hours of television on the weekend?

• TRUE

• FALSE

Is a histogram the same as a bar graph?

• Yes, because they both use intervals.
• No, because a histogram displays numerical data while a bar graph displays categorical data.
• Yes, because they both use bars to display data.
• No, because a histogram displays categorical data while a bar graph displays numerical data.