Correlation and Predictions of Linear Functions

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

• A

• B

• C

• D

What type of correlation does this graph have?

• positive

• negative

• none

• all of the above

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

Based on the graph, if Joe earned $400, how many hours did he work?

• 25 hours

• 35 hours

• 45 hours

• 15 hours

• 
• 
• 
• 

The regression line above was computed to show the Percent of Games Won by Year for the Northside Eagles.  Using the regression line, predict the winning percentage for 1996.

• 48%

• 46%

• 30%

• impossible to tell

• 64

• 74

• 72

• 95

A person travels by car.  They record their miles driven in a data table.  State the correlation coefficient, round to the nearest hundredth, if necessary.

Mathematical Equivalence

ON

Determine the predicted income if 22 hours were worked on an assembly job.

• $207.30

• $449.60

• $691.90

• $543.30

Determine the Correlation Coefficient and decide whether it is weak, moderate, or strong.

• 0.07 weak

• -0.26 weak

• -0.26 moderate

• 0.07 strong