Scatter Plots & Lines of Best Fit

Front

What is a scatter plot?

Back

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

Front

What does a positive association in a scatter plot 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 scatter plot indicate?

Back

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

Front

What does 'no association' mean in a scatter plot?

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 line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatter plot, used to make predictions.

Front

How do you determine the line of best fit?

Back

The line of best fit is determined by minimizing the distance between the line and all the data points, often using the least squares method.

Front

What is the purpose of using a line of best fit?

Back

The purpose is to make predictions about one variable based on the value of another variable.

Front

If the line of best fit has a positive slope, what does that indicate about the relationship between the variables?

Back

It indicates a positive association, meaning that as one variable increases, the other variable also increases.

Front

If the line of best fit has a negative slope, what does that indicate about the relationship between the variables?

Back

It indicates a negative association, meaning that as one variable increases, the other variable decreases.

Front

What is interpolation in the context of scatter plots?

Back

Interpolation is predicting a value within the range of the data points using the line of best fit.