Scatter Plots as Functions

What is the type of correlation?

• Negative 
• no association
• positive 

What type of correlation does this graph have?

• positive 
• negative
• none
• all of the above

What type of correlation does this graph have?

• positive
• negative
• none
• all of the above

What type of correlation does this graph show?

• Positive
• negative
• none
• all of the above

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 140 pages. 

• 12 chapters
• 19 chapters
• 14 chapters
• 21 chapters

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the line of best fit to predict how many pages would be in a book with 6 chapters.

• 100 pages

• 170 pages

• 60 pages

• 20 pages

You are analyzing a scatter plot that has a negative correlation. What is true of the of the x and y values?

• As x increases, y decreases
• As x increases, y increases
• As x decreases, y decreases

The scatter plot show the time spent texting, x, and the time spent exercising, y for 24 students last week. Using the equation of the line of best fit, y = -0.74x + 8.64, what is the predicted time spent exercising for a student who spends 4 hours texting?

• 3.2

• 4.5

• 5.6

• 6.1

The scatter plot show the time spent texting, x, and the time spent exercising, y for 24 students last week. Using the equation of the line of best fit, y = -0.74x + 8.64, what is the predicted time spent exercising for a student who doesn't spend any time texting?

• 11

• 8.64

• 8.5

• Not enough information

The scatter plot show the time spent texting, x, and the time spent exercising, y for 24 students last week. Using the equation of the line of best fit, y = -0.74x + 8.64, for an increase of one hour in time texting, what is the predicted decrease in the time spent exercising?

• -0.74

• 8.64

• 0.74

• Not enough information