Week 7 quiz math 8

These 2 graphs show the number of students getting an average mark of 80 or higher in each grade at Glenwood Middle School.

Which statement is true?

• The 2 graphs are exactly the same.

• Graph A exaggerates the number of students getting 80 or higher

• Graph B shows greater changes in the number of students getting 80 or higher.

• Graph B exaggerates the differences in the number of students getting 80 or higher.

Which graph suggests that the number of sit-ups Ray did in November was more than double the number of sit-ups he did in September?

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These 2 graphs show the number of honour-roll students in each grade at Bridgeport C. I.

Which statement is true?

• The 2 graphs display completely different data.

• Graph B shows that Grade 6 has more than twice as many honour-roll students as Grade 8

• Graph A is a more accurate representation of the data because the graph starts at 0

• Both statements A and B

Barone’s Italian Restaurant advertises that its customers are happier than customers of its competitors. The claim is based on the results of a survey displayed in this graph.

Is the graph misleading? If your answer is yes, explain why it is misleading.

• Yes, not enough restaurants were included in the survey.

• Yes, the use of percent exaggerates the difference in the rating.

• Yes, Barone’s rating looks better than it really is because the graph does not start at 0.

• No, the graph is not misleading

This graph shows the number of customers buying from a store in September and October.

Is the graph misleading? If it is misleading, explain why.

• Yes, the bars do not touch.

• No, the graph is not misleading.

• Yes, the intervals on the vertical axis between 200 and 207 are not even.

• Yes, the graph exaggerates the difference in the number of customers between September and October.

Is this graph misleading? If it is misleading, explain why.

• No, the graph is not misleading.

• Yes, the scale on the horizontal axis is not regular.

• Yes, the graph does not show the new clients for 1996, 1998, 2000, and 2002.

• Yes, the vertical axis gives a false impression of the actual differences in the number of new clients.

These 2 circle graphs show the most popular physical activities that Grade 8 and Grade 9 students participate in.

Which statement is true?

• Equal numbers of students in Grade 8 and Grade 9 play soccer.

• More Grade 8 students prefer swimming.

• Running is the least popular activity in both grades

• The number of Grade 8 students who chose volleyball is the same as the number of Grade 9 students who chose swimming.

The graph shows the number of participants in the Fun Run.

Which statement is true?

• The number of participants doubled between 2005 and 2006.

• The number of participants doubled between 2005 and 2007.

• There was a 100% increase in the number of participants from 2005 to 2008.

• There was a 100% increase in the number of participants from 2006 to 2007.

These graphs show Enid’s scores on 3 tests. In which graph are the data misrepresented?

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The graphs show TV viewing habits over a 2-week period.

Which graph does NOT give misleading information?

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