Grade 8 Scatter Plots Quiz with Answers – Free PDF

Contents

This grade 8 scatter plots quiz asks 10 multiple-choice questions on scatter plots and association, and each answer comes with a short explanation.

This 10-question quiz checks standard 8.SP.A.1: reading scatter plots, naming positive, negative, linear and nonlinear patterns, and spotting clusters and outliers. Wrong answers match common mistakes, so read each explanation to see why the right answer works.

Grade 8Common Core: 8.SP.A.1

🎯 Scatter Plots and Association – Grade 8 math quiz

Score: 0 / 10

Answered: 0 / 10

Question 1

What association does the scatter plot show?

Hours studied and quiz score.

A Negative linear association

B No association

C Nonlinear association

D Positive linear association

Question 2

What association does the scatter plot show?

Temperature and cups of cocoa sold.

A Negative linear association

B Positive linear association

C No association

D Nonlinear association

Question 3

What association does the scatter plot show?

Shoe size and test score.

A Positive linear association

B No association

C Negative linear association

D Nonlinear association

Question 4

What association does the scatter plot of a kicked ball show?

Height of a kicked ball.

A Positive linear association

B Negative linear association

C No association

D Nonlinear association

Question 5

Which point is the outlier?

Practice and free throws.

A (1, 6)

B (8, 17)

C (4, 11)

D (7, 3)

Question 6

Which pair of variables would most likely show a negative association?

A Height and arm span of students

B Age and weight of a growing puppy

C Miles driven and gas left in the tank

D Hours of practice and free throws made

Question 7

A scatter plot has two separate groups of points with a gap between them. What are the groups called?

A Outliers

B Clusters

C Linear patterns

D Negative associations

Question 8

What does a positive association between two variables mean?

A As one variable increases, the other tends to decrease

B As one variable increases, the other tends to increase

C One variable causes the other to increase

D The points form a perfect straight line

Question 9

How many clusters does the scatter plot show?

Ages and heights of campers.

A 1 cluster

B 3 clusters

C 2 clusters

D 12 clusters

Question 10

Which pair of variables would most likely show no association?

A A student's shoe size and the day of the month she was born

B A car's age and its trade-in value

C The temperature and cups of hot cocoa sold

D A tree's age and its height

🎉 Quiz complete!

0 / 10

How does this quiz work?

Read each question, choose one answer among A, B, C and D, then check it: a short explanation appears after every answer. Your score out of 10 is shown at the end, and you can restart the quiz as often as you like.

What should you review before the quiz?

Reread the key facts of the lesson and the worked example. If a question is hard, go back to the matching part of the lesson, then try the quiz again. Write your work on scrap paper: most mistakes come from skipping a step, not from the idea itself.

Remember:

Standard 8.SP.A.1: construct and interpret scatter plots for bivariate measurement data.
Positive association: as \(x\) increases, \(y\) tends to increase. Negative association: \(y\) tends to decrease.
A linear association stays near a straight line; a nonlinear association follows a curve.
A cluster is a group of nearby points; an outlier is a point far from the pattern.
Association does not prove that one variable causes the other.