8.SP.A.1 - Scatterpolots

Determine what type of correlation each scatterplot shows.

a

b

c

d

e

No Correlation 1

Negative 1

Positive

No Correlation 2

Negative 2

What is the approximate value of y if x = 12?

• 100

• 110

• 120

• 140

How many students studied less than 2 hours and received a grade of at least 80 on the test?

• 4

• 9

• 10

• 13

What is the x-value for the data point that represents the outlier?

Which of these points is the outlier?

A scatter plot suggests a negative linear association. Which could be the scenario represented.

• The greater the amount of rainfall, the more umbrellas sold.

• The higher the outdoor temperature, the less time for the clothes to dry on the line.

• The more hours John spends studying, the higher his test scores.

• The less gas Molly puts into her car, the less she pays.

Describe the association between x and y in the scatter plot shown. Ignore the outlier.

• Strong negative association

• Weak negative association

• Strong positive association

• Weak positive association

When a data set is graphed as a scatter plot, Helena notices that all the data points are roughly in a straight line with a negative slope.

What can Helena infer from the scatter plot?

• The data follow a linear relationship.

• The data have multiple outliers.

• The data have a positive association.

• The data prove a causal relationship between the variables.

Consider the scatter plot shown. Which statement about the scatter plot is correct?

• The scatter plot shows a positive association between x and y because the data points show a clear pattern of relationship with a positive slope.

• The scatter plot shows a negative association between x and y because the data points show a clear pattern of relationship with a negative slope.

• The scatter plot shows no relationship between x and y because the data points show no clear pattern of relationship.

• The scatter plot shows a negative association between x and y because the data points show no clear pattern of relationship.

A scatter plot is shown in the figure. Which phrase best describes the data of this scatter plot?

• linear association with clustering

• negative nonlinear association

• nonlinear association with outliers

• positive linear association