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Bivariate Data and Scatter Plots Practice Tests

These Grade 8 Math practice tests cover paired numerical data, scatter plots, positive and negative associations, trends, line of best fit, residuals, outliers, and predictions.

Skills covered

  • Reading ordered pairs, tables, domains, and ranges
  • Describing positive, negative, weak, strong, and no association
  • Interpreting clusters, outliers, trend lines, and residuals
  • Distinguishing interpolation, extrapolation, association, and causation
  • Using real-world data to make and evaluate predictions

How to use these practice tests

Read both axes and their units first. Then describe the direction and strength of the association, inspect unusual points, and use a trend line only within a reasonable data range.

For more Grade 8 Math practice, return to the Grade 8 Math category.

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5 Tests
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1. Test

Grade 8 Bivariate Data and Scatter Plots Practice Tests

Practice Grade 8 Math questions about bivariate data, scatter plots, associations, trend lines, residuals, outliers, predictions, and real-world contexts.

Choose the best answer for each question. Identify both variables, read the scale, describe the association, and distinguish association from causation.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

A data set has ordered pairs (1,3),(2,5),(3,7)(1,3),(2,5),(3,7). What is the output when the input is 2?

Please select an answer first.

Correct answer: A

The correct answer is 55.

  1. Identify the two variables: Name the input and output variables and read each ordered pair, table, or graph carefully.
  2. Analyze the association: Read the second coordinate paired with input 2. The output is 5.
  3. Check the prediction: Decide whether the conclusion is interpolation, extrapolation, association, causation, or an observation about an outlier.

Read the second coordinate paired with input 2. The output is 5.

2. QuestionMultiple choice

In the ordered pair (4,12)(4,12), which value is the output?

Please select an answer first.

Correct answer: B

The correct answer is 1212.

  1. Identify the two variables: Name the input and output variables and read each ordered pair, table, or graph carefully.
  2. Analyze the association: In an ordered pair (x,y)(x,y), the second coordinate y is the output.
  3. Check the prediction: Decide whether the conclusion is interpolation, extrapolation, association, causation, or an observation about an outlier.

In an ordered pair (x,y)(x,y), the second coordinate y is the output.

3. QuestionMultiple choice

A table lists hours studied as 1,2,31,2,3 and scores as 70,78,8670,78,86. What is the score for 3 hours?

Please select an answer first.

Correct answer: C

The correct answer is 8686.

  1. Identify the two variables: Name the input and output variables and read each ordered pair, table, or graph carefully.
  2. Analyze the association: Read the output in the row paired with 3 hours: the score is 86.
  3. Check the prediction: Decide whether the conclusion is interpolation, extrapolation, association, causation, or an observation about an outlier.

Read the output in the row paired with 3 hours: the score is 86.

4. QuestionMultiple choice

Which ordered pair represents 5 books costing $20 total?

Please select an answer first.

Correct answer: D

The correct answer is (5,20)(5,20).

  1. Identify the two variables: Name the input and output variables and read each ordered pair, table, or graph carefully.
  2. Analyze the association: The first coordinate is the number of books and the second coordinate is the total cost.
  3. Check the prediction: Decide whether the conclusion is interpolation, extrapolation, association, causation, or an observation about an outlier.

The first coordinate is the number of books and the second coordinate is the total cost.

5. QuestionMultiple choice

What is the domain of (1,4),(2,6),(5,6)\\{(1,4),(2,6),(5,6)\\}?

Please select an answer first.

Correct answer: A

The correct answer is 1,2,5\\{1,2,5\\}.

  1. Identify the two variables: Name the input and output variables and read each ordered pair, table, or graph carefully.
  2. Analyze the association: The domain contains the distinct first coordinates: 1, 2, and 5.
  3. Check the prediction: Decide whether the conclusion is interpolation, extrapolation, association, causation, or an observation about an outlier.

The domain contains the distinct first coordinates: 1, 2, and 5.

6. QuestionMultiple choice

What is the range of (1,4),(2,6),(5,6)\\{(1,4),(2,6),(5,6)\\}?

Please select an answer first.

Correct answer: B

The correct answer is 4,6\\{4,6\\}.

  1. Identify the two variables: Name the input and output variables and read each ordered pair, table, or graph carefully.
  2. Analyze the association: The range contains the distinct second coordinates: 4 and 6.
  3. Check the prediction: Decide whether the conclusion is interpolation, extrapolation, association, causation, or an observation about an outlier.

The range contains the distinct second coordinates: 4 and 6.

7. QuestionMultiple choice

A table has x-values 0,1,20,1,2 and y-values 2,5,82,5,8. What is the change in y for each increase of 1 in x?

Please select an answer first.

Correct answer: C

The correct answer is 33.

  1. Identify the two variables: Name the input and output variables and read each ordered pair, table, or graph carefully.
  2. Analyze the association: The y-values increase by 3 each time: 5−2=35-2=3 and 8−5=38-5=3.
  3. Check the prediction: Decide whether the conclusion is interpolation, extrapolation, association, causation, or an observation about an outlier.

The y-values increase by 3 each time: 5−2=35-2=3 and 8−5=38-5=3.

8. QuestionMultiple choice

Which pair of variables is bivariate data?

Please select an answer first.

Correct answer: D

The correct answer is Temperature and ice cream sales.

  1. Identify the two variables: Name the input and output variables and read each ordered pair, table, or graph carefully.
  2. Analyze the association: Bivariate data records two variables for each observation, such as temperature and sales.
  3. Check the prediction: Decide whether the conclusion is interpolation, extrapolation, association, causation, or an observation about an outlier.

Bivariate data records two variables for each observation, such as temperature and sales.

9. QuestionMultiple choice

A data point is (8,42)(8,42). What does 8 represent when x is time and y is distance?

Please select an answer first.

Correct answer: A

The correct answer is The time value.

  1. Identify the two variables: Name the input and output variables and read each ordered pair, table, or graph carefully.
  2. Analyze the association: The first coordinate is the x-value, so it represents time.
  3. Check the prediction: Decide whether the conclusion is interpolation, extrapolation, association, causation, or an observation about an outlier.

The first coordinate is the x-value, so it represents time.

10. QuestionMultiple choice

Which graph is commonly used to display paired numerical data?

Please select an answer first.

Correct answer: B

The correct answer is A scatter plot.

  1. Identify the two variables: Name the input and output variables and read each ordered pair, table, or graph carefully.
  2. Analyze the association: A scatter plot shows individual ordered pairs for two numerical variables.
  3. Check the prediction: Decide whether the conclusion is interpolation, extrapolation, association, causation, or an observation about an outlier.

A scatter plot shows individual ordered pairs for two numerical variables.

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