Scatterplots and Illustrative Math

Based on this scatterplot, approximate what score should a student who attended class 22 days expect to receive on the exam?

• 84

• 71

• 95

• 75

What type of relationship does this graph show?

• Positive

• Negative

• No Relationship

• Constant 

Tags

CCSS.HSF-LE.A.1B

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

Describe the correlation coefficient if

r = 0.90

• Positive, weak

• Positive, strong

• Negative, weak

• Negative, strong

Find the equation of the line of best fit for this table.

• y = -2.28x + 51.08

• y = 51.08x - 2.28

• y = 0.06x - 0.26

• y = -2.28x - 0.26

Predict how much money is spent at the mall if you were to be there for 7 hours.

• $30

• $35

• $40

• $45

Tags

CCSS.HSF-LE.A.1B

Describe the correlation, if the correlation coefficient is r = -0.26

• Positive, weak

• Negative, weak

• Positive, strong

• Negative, strong

A group of friends recorded the time it took to ride their bikes around the park.  This scatter plot shows their results with the line of best fit.  Which is closest to the number of minutes it would take to complete 9 laps?

• 4

• 5

• 6

• 7

Based on the line of best fit for the scatter plot, which of the following amounts is closest to the cost of a 120-minute phone call?

• $10

• $12

• $15

• $20

Which graph shows the line of best fit?

• Graph A

• Graph B

• Graph C

• Graph D

Tags

CCSS.8.EE.B.5