8th Grade Test 11

Which sentence describes the relationship shown on this scatter plot?

• As the temperature decreases, the visitors increase. 
• As the temperature increases, the number of visitors increases. 
• As the visitors increase, the temperature decreases. 
• No correlation

What type of association does this scatter plot represent?

• positive linear association
• negative linear association
• no association
• nonlinear association

What type of association (correlation) does this graph have?

• positive 
• negative
• none
• all of the above

What type of correlation does this graph have?

• positive
• negative
• none
• all of the above

Which equation best represents the data?

• A  y = 2x + 2
• B  y= 1/2x - 2
• C  y = -2x + 2
• D  y = -1/2x + 2

What is the mode?

• # happening the most
• the average
• biggest - smallest
• the middle #

What is the mean?

• # happening the most
• the number in the middle
• biggest-smallest
• the average

The number of pages that Carolyn wrote in her journal each day from Monday to Friday is shown below: 
9, 8, 12, 6, 10
What is the mean number of pages she wrote per day?

• 5
• 6
• 9
• 11

The number of miles that Jenna cycled each week for a 7-week period is shown: 
36, 42, 28, 52, 48, 36, 31 
What is the median number of miles Jenna cycled?

• 24
• 36
• 39
• 52

Find the range.
5, 15, 10, 20, 15, 10, 15

• 5
• 10
• 15
• 13