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Back to Exercise: Construct and interpret scatter plots for bivariate measurement data

Exercises: Reading and Building Scatter Plots

Work through each section in order. When you read a scatter plot, look at the whole cloud of points, not one point at a time. Use the words positive, negative, linear, nonlinear, cluster, and outlier to describe what you see.

Grade 8·23 problems·~35 min·Common Core Math - Grade 8·container·8-sp-a-1
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A

Recall / Warm-Up

1.

In a scatter plot, what does each single point stand for?

2.

A student has the ordered pair (3,7)(3, 7). Starting at the origin, how many units to the right is this point plotted on the horizontal axis?

A scatter plot whose points rise from the lower left to the upper right
3.

Look at the scatter plot. As you move from left to right, the cloud of points generally goes up. What direction is the trend?

B

Fluency Practice

1.

A table lists 5 students with (study hours, score): (1,60)(1, 60), (2,68)(2, 68), (3,74)(3, 74), (4,80)(4, 80), (5,88)(5, 88). If you plot these as a scatter plot, how many points will appear?

A scatter plot whose points fall from the upper left to the lower right
2.

A scatter plot of outside temperature versus heating bill is shown. How would you describe the association?

A scatter plot with points scattered randomly and no visible trend
3.

A scatter plot of shoe size versus math test score is shown. The points are scattered with no upward, downward, or curved trend. How would you describe the association?

A scatter plot whose points rise steeply at first then level off, forming a curve
4.

A scatter plot of a child's age versus height is shown. The points rise quickly at first, then the rise levels off, following a curved path. Is the association linear or nonlinear?

A scatter plot with an upward band of points and one point far above the band
5.

The scatter plot shows a clear upward trend, but one point sits far above and away from the rest. What is that lone point called?

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