Scatterplots

Front

What is a scatterplot?

Back

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

Front

What does a linear scatterplot indicate?

Back

A linear scatterplot indicates a straight-line relationship between the two variables, meaning as one variable increases, the other variable tends to increase or decrease at a constant rate.

Front

What does a non-linear scatterplot indicate?

Back

A non-linear scatterplot indicates a relationship between the variables that does not follow a straight line, suggesting that the rate of change varies.

Front

What is a trendline in a scatterplot?

Back

A trendline is a line that best represents the data points in a scatterplot, showing the general direction of the data.

Front

How can you determine the strength of a relationship in a scatterplot?

Back

The strength of a relationship can be determined by how closely the data points cluster around the trendline; a tighter cluster indicates a stronger relationship.

Front

What does a weak association in a scatterplot look like?

Back

A weak association in a scatterplot appears when the data points are widely scattered and do not closely follow a trendline.

Front

How do you interpret the slope of a trendline?

Back

The slope of a trendline indicates the rate of change between the two variables; a positive slope means both variables increase together, while a negative slope means one variable increases as the other decreases.

Front

What is the x-axis in a scatterplot?

Back

The x-axis in a scatterplot represents the independent variable, which is the variable that is manipulated or changed.

Front

What is the y-axis in a scatterplot?

Back

The y-axis in a scatterplot represents the dependent variable, which is the variable that is measured or observed.

Front

How can you use a scatterplot to make predictions?

Back

You can use a scatterplot to make predictions by extending the trendline to estimate values of the dependent variable based on known values of the independent variable.