Scatterplots and Lines of Best Fit

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 is a line of best fit?

Back

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

Front

What does it mean if a line is NOT a line of best fit?

Back

It means the line does not accurately represent the trend of the data, often because it does not pass through the middle of the data points.

Front

What is a cluster in a scatterplot?

Back

A cluster is a group of data points that are close together in a specific area of the graph.

Front

What is a gap in a scatterplot?

Back

A gap is an area in the scatterplot where there are no data points, indicating a lack of observations in that range.

Front

What does positive correlation mean?

Back

Positive correlation means that as one variable increases, the other variable also tends to increase.

Front

What does negative correlation mean?

Back

Negative correlation means that as one variable increases, the other variable tends to decrease.

Front

What is the purpose of drawing a trend line?

Back

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

Front

How can you identify clusters in a scatterplot?

Back

Clusters can be identified by looking for areas where data points are densely packed together.

Front

What is the significance of the slope of the line of best fit?

Back

The slope indicates the direction and strength of the relationship between the two variables.