Scatterplots

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 the line of best fit represent in a scatterplot?

Back

The line of best fit is a straight line that best represents the data on a scatterplot. It shows the general direction (trend) of the data points.

Front

How can you determine the line of best fit?

Back

The line of best fit can be determined using methods such as least squares regression, which minimizes the distance between the data points and the line.

Front

What is the purpose of using a trend line in a scatterplot?

Back

A trend line helps to visualize the relationship between the two variables and can be used to make predictions based on the data.

Front

What does a positive slope in a line of best fit indicate?

Back

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

Front

What does a negative slope in a line of best fit indicate?

Back

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

Front

What is the equation of a line in slope-intercept form?

Back

Front

How can you use a scatterplot to make predictions?

Back

You can use the line of best fit to estimate the value of one variable based on the value of another variable.

Front

What does it mean if the points on a scatterplot are closely clustered around the line of best fit?

Back

If the points are closely clustered around the line of best fit, it indicates a strong correlation between the two variables.

Front

What does it mean if the points on a scatterplot are widely scattered?

Back

If the points are widely scattered, it indicates a weak correlation between the two variables.