Scatterplots & Trends

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 positive correlation indicate in a scatterplot?

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 scatterplot?

Back

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

Front

What does 'no correlation' mean in the context of scatterplots?

Back

No correlation means there is no discernible relationship between the two variables; the data points are scattered without any clear pattern.

Front

What is a trend line in a scatterplot?

Back

A trend line is a straight line that best represents the data on a scatterplot, showing the general direction of the data points.

Front

How can you identify a linear relationship in a scatterplot?

Back

A linear relationship can be identified if the data points form a straight line or a pattern that closely resembles a straight line.

Front

What is a nonlinear relationship in a scatterplot?

Back

A nonlinear relationship occurs when the data points do not form a straight line, indicating a more complex relationship between the variables.

Front

What is the purpose of using a trend line?

Back

The purpose of using a trend line is to summarize the relationship between the variables and make predictions based on the data.

Front

How do you interpret the slope of a trend line?

Back

The slope of a trend line indicates the rate of change between the two variables; a steeper slope means a greater change.

Front

What does it mean if a scatterplot is tightly clustered around a trend line?

Back

If a scatterplot is tightly clustered around a trend line, it indicates a strong correlation between the variables.