Scatterplots

Mr. Thomas wanted to know if the amount of class time that he gave students to study affected their test scores.  What kind of relationship between class study time and test scores is shown on the scatter plot.

• No correlation
• Positive correlation
• Negative correlation
• Positive then negative correlation

Tags

CCSS.HSF.LE.B.5

The scatter plot shows the number of absences in a week for classes of different sizes.  Trevor concluded that there is a positive correlation.  Which statement best describes why Trevor's conclusion was incorrect.

• The largest class does not have the most absences.
• The smallest class does not have the least number of absences.
• The data show no relationship between class size and number of absences.
• The data show a negative relationship between class size and number of absences.

Tags

CCSS.8.SP.A.1

CCSS.8.SP.A.2

CCSS.8.F.B.5

This scatterplot could show the relationship between which two variables?

• speed of an airplane (x) vs. distance traveled in one hour (y)
• outside air temperature (x) vs. air-conditioning costs (y)
• age of an adult (x) vs. height of an adult (y)
• distance traveled (x) vs. gas remaining in the tank (y)

Tags

CCSS.8.SP.A.1

CCSS.8.SP.A.2

CCSS.8.F.B.4

Which graph best shows a positive correlation between the number of hours studied and the test scores?

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

Tags

CCSS.8.EE.B.5

Which graph shows a line of best fit for the scatter plot?

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

Tags

CCSS.8.EE.B.5

For which scatter plot would the line of best fit be represented by the equation y = ½x + 2?

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

Tags

CCSS.8.EE.B.5

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

Tags

CCSS.8.SP.A.1

CCSS.8.SP.A.2

CCSS.8.F.B.4

CCSS.8.F.B.5

CCSS.8.SP.A.3

Which graph shows the line of best fit?

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

Tags

CCSS.8.EE.B.5