Scatterplots and Best Fit Lines

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.  (a)  

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

The number of siblings you have and your weight.  (a)  

• Positive correlation
• Negative correlation
• No correlation
• All of the above

What type of correlation (association)?The outside temperature and the amount of layers you wear.  (a)  

• Positive correlation
• Negative correlation
• No correlation
• All of the above

Find the slope for the trend line using points (2,2) and (4,3) (a)  

• 2
• 1/2
• -2
• -1/2

Which scatter plot shows a linear relationship between x and y? (a)  

• Graph A
• Graph B
• Graph C
• Graph D

What is the correlation? (a)  

• Negative correlation
• No correlation
• Positive correlation
• All of the above

As the age of the car increases, its value decreases. Which scatterplot represents this relationship? (a)  

• A
• B
• C
• D

Which choice best defines the term "linear function"?

• An equation that is the bomb diggity
• An equation that can be written in slope-intercept form
• An equation with an exponent in it
• An equation that has a slope but not a y-intercept

• 440 turtles
• 40 turtles
• 150 turtles
• 90 turtles

What is a line of best fit 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