Scatterplots and Trend Lines

Which scatterplot shows a weak negative correlation?

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Oren plants a new vegetable garden each year for 14 years. The scatterplot shows the relationship between the number of seeds he plants and the number of plants that grow. Which number best represents the slope of the line of best fit through the data?

• -10

• -1/10

• 1/10

• 10

Tags

CCSS.8.EE.B.5

The scatterplot shows the relationship between the number of bags of popcorn that are sold and the price per bag.

Which of these graphs shows the line of best fit?

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Tags

CCSS.8.EE.B.5

Mrs. Ochoa recorded the age and show size of each student in her physical education class. The graph shows her data.

Which of the following statements about the graph is true?

• The graph shows a positive trend.

• The graph shows a negative trend.

• The graph shows a constant trend.

• The graph shows no trend.

Tags

CCSS.8.EE.B.5

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

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The table shows the number of students on a basketball team and the number of free throws each student made during practice. Based on this information, which best describes the relationship between the number of students and the number of free throws each student made?

• No relationship

• Positive linear

• Negative linear

• Quadratic

Tags

CCSS.8.F.A.3

The scatterplot shows the number of absences in a week for classes of different sizes. Trevor concluded that there is a positive correlation between class size and the number of absences. Which statement best describes why Trevor's conclusion was incorrect?

• The data show a negative relationship between class size and number of absences.

• The data show no relationship between class size and number of absences.

• The smallest class does not have the least number of absences.

• The largest class does not have the most absences.

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

• Graph A

• Graph B

• Graph C

• Graph D

Tags

CCSS.8.F.A.3

What is a scatter plot?

• A graph that shows the relationship of two data sets.

• A graph drawn using rectangular bars to show how large each value is.

• A graph that shows information that is connected in some way.

• A graph that shows data changing over time.

Which best describes the form of this scatterplot?

• linear

• nonlinear

• scattered

Tags

CCSS.8.F.A.3