Test Review

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

To create a linear regression for data in your calculator:

• STAT -> CALC -> LINREG

• STAT -> CALC -> 1VARSTATS

• STAT -> CALC -> EXPREG

• 2ND -> TRACE -> INTERSECT

Using the scatterplot and best fit line, estimate what the resting heart rate is after 2 hours of exercise.

• 65

• 85

• 72

• 62

Using the given scatter plot, estimate how many emails per day an 18 year old gets.

• 48

• 38

• 28

• 18

What kind of correlation?

• Positive
• Negative
• No

What kind of correlation?

• Positive
• Negative
• No

Using the line of best fit, what is the annual cost of raising and 18 year old child?

• $17,930

• Super Expensive

• $18,560

• $16,500

What kind of correlation?

• Positive
• Negative
• No

What kind of correlation?

• Positive
• Negative
• No

r=-0.89

• Strong positive 
• Weak positive 
• Strong negative 
• Weak negative