3.8 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.

Front

What does a positive correlation indicate in a scatter plot?

Back

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

Front

What does a negative correlation indicate in a scatter plot?

Back

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

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 variable do not predict changes in the other.

Front

How can you identify a positive correlation in a scatter plot?

Back

A positive correlation can be identified when the data points slope upwards from left to right.

Front

How can you identify a negative correlation in a scatter plot?

Back

A negative correlation can be identified when the data points slope downwards from left to right.

Front

What is the purpose of using scatter plots?

Back

Scatter plots are used to visually represent the relationship between two variables and to identify trends, correlations, or patterns.

Front

What is an example of a positive correlation?

Back

An example of a positive correlation is the relationship between study time and test scores; as study time increases, test scores tend to increase.

Front

What is an example of a negative correlation?

Back

An example of a negative correlation is the relationship between the age of a car and its value; as the age of the car increases, its value tends to decrease.

Front

What does it mean if a scatter plot shows a nonlinear association?

Back

A nonlinear association means that the relationship between the variables does not follow a straight line; it may curve or change direction.