Scatterplots & Trendlines

Front

What is a scatterplot?

Back

A scatterplot is a graph that displays values for typically two variables for a set of data. Each point represents an observation in the dataset.

Front

What does a positive association in a scatterplot indicate?

Back

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

Front

What does a negative association in a scatterplot indicate?

Back

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

Front

What does 'no association' mean in the context of a scatterplot?

Back

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

Front

What is a trendline?

Back

A trendline is a line that is drawn on a scatterplot to represent the general direction of the data points.

Front

How can you determine the cost of a phone call from a scatterplot?

Back

You can determine the cost by locating the corresponding point on the trendline that matches the duration of the call.

Front

What is a linear relationship in a scatterplot?

Back

A linear relationship is when the data points can be approximated by a straight line, indicating a constant rate of change.

Front

What is a nonlinear relationship in a scatterplot?

Back

A nonlinear relationship is when the data points do not form a straight line, indicating that the rate of change varies.

Front

What is correlation?

Back

Correlation is a statistical measure that describes the extent to which two variables change together.

Front

What is a positive correlation?

Back

A positive correlation occurs when both variables increase or decrease together.