Introduction to Scatterplots and Correlation

The scatter plot below shows the number of books read by students in Mrs. Hall’s English class and their final grades. Which statement represents the best description about the line of best fit?

• The more books students read, the lower their English grade.

• The more books students read, the higher their English grade.

• The fewer books students read, the higher their English grade. 

• No relationship exists between the number of books students read and their English grades. 

The police department tracked the number of ticket writers and number of tickets issued for the past 8 weeks.  The scatter plot shows the results.  Which statement is true?

• More ticket writers results in fewer tickets issued.

• There were 50 tickets issued every week.

• When there are 10 ticket writers, there will be 800 tickets issued.

• More ticket writers results in more tickets issued.

Based on this data, how much money would the carpenter earn from a job that took 3 days to complete?

• $740

• $1000

• $550

• $1740

Which scatter plot shows no relationship?

• Graph A

• Graph B

• Graph C

• Graph D

What is a best-fit line used for?

• To make predictions

• To make the graph look pretty

• To connect the points

• To make it look like you know what you are doing

Name the correlation in this graph

• Lots of Correlation

• No Correlation

• Positive Correlation

• Negative Correlation

Name the correlation in this graph

• Positive Correlation

• Negative Correlation

• No Correlation

• Lots of Correlation

Name the correlation in this graph

• Negative Correlation

• No Correlation

• Lots of Correlation

• Positive Correlation

Name the correlation in this sentence: A runner's time and the distance to the finish line. 

• Positive Correlation

• Negative Correlation

• Lots of Correlation

• No Correlation

Name the correlation in this sentence: The number of people in an audience and ticket sales. 

• No Correlation

• Positive Correlation

• Negative Correlation

• Lots of Correlation