8th Grade Scatter Plots and Association Quiz: 10 Questions with Explanations

8th Grade math quiz: Scatter Plots and Association – Maths PDF

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This grade 8 scatter plots quiz for 8th Grade covers scatter plots and association (Common Core 8.SP.A.1, 8.SP.A.2), with a free PDF to print.

Pick the best answer for each of the 10 questions about scatter plots, patterns of association, outliers and informal trend lines (Common Core 8.SP.A.1 and 8.SP.A.2). Read each question carefully, then read the explanation to learn from any mistake.

Grade 8 · Common Core State Standards: 8.SP.A.1, 8.SP.A.2

Grade 8 scatter plots quiz: 10 questions

Question 1

As the temperature rises, hot cocoa sales fall. This is a

Question 2

A point far from the rest of the points in a scatter plot is called a(n)

Question 3

Study data.

What type of association does the scatter plot show?

Question 4

A thrown ball.

The scatter plot is best described as

Question 5

A trend line has the equation \(y = 2x + 5\). What is the predicted \(y\) when \(x = 10\)?

Question 6

A trend line passes through (0, 10) and (4, 30). What is its slope?

Question 7

Which statement is true about association?

Question 8

Ice cream sales with a trend line.

What does the slope 1.2 of the trend line mean?

Question 9

Points are spread out widely around a line. The association is

Question 10

Which is the best trend line for points (1, 3), (2, 5), (3, 7), (4, 9)?

Remember

Positive association: as x increases, y tends to increase.
Negative association: as x increases, y tends to decrease.
Clusters are groups of points; outliers are points far from the pattern.
A linear association has points near a straight line; nonlinear follows a curve.
A trend line has about as many points above as below and is close to the points.

How to use this grade 8 scatter plots quiz

Answer each question, read the explanation that appears, and keep track of your score. A score of 8 out of 10 or more means you are ready for the test.

Download the grade 8 scatter plots quiz as a PDF with the button below and keep it with your notes.

All Grade 8 chapters: Grade 8 math.

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