Scatter Plots and Association: Grade 8 Math Quiz – PDF Download
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
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Question 1
What association does the scatter plot show?Hours studied and quiz score.
ANegative linear association
BNo association
CNonlinear association
DPositive linear association
Question 2
What association does the scatter plot show?Temperature and cups of cocoa sold.
ANegative linear association
BPositive linear association
CNo association
DNonlinear association
Question 3
What association does the scatter plot show?Shoe size and test score.
APositive linear association
BNo association
CNegative linear association
DNonlinear association
Question 4
What association does the scatter plot of a kicked ball show?Height of a kicked ball.
APositive linear association
BNegative linear association
CNo association
DNonlinear 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?
AHeight and arm span of students
BAge and weight of a growing puppy
CMiles driven and gas left in the tank
DHours 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?
AOutliers
BClusters
CLinear patterns
DNegative associations
Question 8
What does a positive association between two variables mean?
AAs one variable increases, the other tends to decrease
BAs one variable increases, the other tends to increase
COne variable causes the other to increase
DThe points form a perfect straight line
Question 9
How many clusters does the scatter plot show?Ages and heights of campers.
A1 cluster
B3 clusters
C2 clusters
D12 clusters
Question 10
Which pair of variables would most likely show no association?
AA student's shoe size and the day of the month she was born
BA car's age and its trade-in value
CThe temperature and cups of hot cocoa sold
DA tree's age and its height
🎉 Quiz complete!
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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.
