Scatter Plots

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Tags

CCSS.8.SP.A.1

Front

What does a positive correlation in a scatter plot indicate?

Back

A positive correlation indicates that as one variable increases, the other variable also tends to increase.

Tags

CCSS.HSS.ID.B.5

Front

What does a negative correlation in a scatter plot indicate?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Tags

CCSS.HSS.ID.B.5

Front

What does no correlation mean in a scatter plot?

Back

No correlation means there is no apparent relationship between the two variables; changes in one do not affect the other.

Tags

CCSS.HSS.ID.B.5

Front

How can you determine the trend in a scatter plot?

Back

You can determine the trend by observing the overall direction of the data points; if they rise, it's positive; if they fall, it's negative.

Front

What is the purpose of a trend line in a scatter plot?

Back

A trend line is used to summarize the relationship between the variables and to make predictions based on the data.

Front

If a scatter plot shows that as temperature increases, the number of visitors increases, what type of correlation is this?

Back

This is a positive correlation.

Tags

CCSS.HSS.ID.B.5

Front

In a scatter plot, what does it mean if the points are widely scattered?

Back

Widely scattered points indicate a weak correlation between the variables.

Front

What is the relationship between the number of absences and final exam scores in the given example?

Back

The relationship shows that more absences are associated with lower final exam scores.

Tags

CCSS.HSF-LE.A.1B

Front

How can you use a scatter plot to make predictions?

Back

You can use a scatter plot to make predictions by extending the trend line to estimate values for variables not directly measured.