Scatterplots

Which equation could describe the line of best fit for this graph?

• y = 5x + 236

• y = -5x + 236

• y = 1/5x + 236

• y = -1/5x + 236

A researcher gathered data to predict the number of new types of plants (y) that will be in a state park after x years.  After making a scatter plot of the data, she determined the equation of a line of best fit to be
y = 0.25x + 8
Based on the equation, what is the number of new types of plants that will be in the park after 24 years?

• 8

• 14

• 32

• 64

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

The following scatter plot shows Pam's training as she prepares to run a 6 mile race at the end of the month.  Which of the following would be a reasonable approximation for the length of time it would take for her to run 6 miles? 

• 50 min

• 80 min

• 45 min

• 60 min

What is the correlation between length of running start and distance of jump?

• positive:  the further you run the further you jump

• negative: the less you run the less distance of your jump

• positive: the further your running start the less your distance

What type of correlation does this scatterplot display?

• Positive

• Negative

• No Correlation

Which scatterplot DOES NOT suggest a linear relationship between x and y?

• Graph A

• Graph B

• Graph C

• Graph D

Which scatterplot does NOT suggest a linear relationship between x and y?

• Graph F

• Graph G

• Graph H

• Graph J

Which graph best shows a positive association between the number of hours studied and the test scores?

• Graph A

• Graph B

• Graph C

• Graph D

What type of correlation does this graph have?

• positive

• negative

• none

• all of the above