Scatter Plots and Trend Lines

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 negative correlation in a scatter plot indicate?

Back

A negative correlation indicates that as one variable increases, the other variable decreases.

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 increases.

Front

What is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatter plot, used to make predictions.

Front

What is the purpose of analyzing scatter plots?

Back

The purpose is to identify relationships between variables, such as correlation and trends.

Front

What does 'no correlation' mean in a scatter plot?

Back

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

Front

How can you determine the strength of a correlation in a scatter plot?

Back

The strength of a correlation can be determined by how closely the data points cluster around the line of best fit.

Front

What is an example of a positive association?

Back

An example of a positive association is the relationship between the number of hours studied and test scores.

Front

What is an example of a negative association?

Back

An example of a negative association is the relationship between the amount of gas in a tank and the distance a car can travel.

Front

What does it mean if a scatter plot shows a cluster of points?

Back

A cluster of points indicates that there is a strong relationship between the two variables in that area.