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 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 scatter plot, showing the general direction of the data points.

Front

How do you determine the line of best fit?

Back

The line of best fit can be determined by visually inspecting the scatter plot and drawing a line that minimizes the distance of all points from the line.

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 in a scatter plot mean?

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 an outlier in a scatter plot?

Back

An outlier is a data point that is significantly different from other points in the dataset, which can affect the line of best fit.

Front

Can a line of best fit go through the origin?

Back

No, a line of best fit does not have to go through the origin; it can be positioned anywhere on the graph depending on the data.

Front

What is the purpose of a trend line in a scatter plot?

Back

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

Front

How can you tell if a trend line is a good fit for the data?

Back

A trend line is a good fit if it closely follows the pattern of the data points and minimizes the distance from the points to the line.