Scatterplots

What type of association does this graph have?

• positive 
• negative
• none
• all of the above

Is this line an accurate line estimate of best fit for the data?

• Yes

• No

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

About how many male math teachers were there in 2006?

• 15
• 30
• 35
• 45

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters
• 15 chapters
• 18 chapters
• 21 chapters

Which of the following lines represents the line of best fit for the scatter plot?

• A
• B
• C
• D

Select the statement that best describes the line.

• The line is the line of best fit.
• The line is NOT a line of best fit because it does not pass through two points.
• The line is NOT a line of best fit because it does not go through the middle of the data set.
• The line is NOT a line of best fit because it does not go through the origin.

Which of the following is not shown on the scatter plot below?

• a cluster

• negative association

• positive association

• an outlier

Estimate the y-value when the x is 10?

• 11

• 15

• 13

• 8

Estimate the y-value when the x is 2?

• 6

• 4

• 2

• 5