Least Squares Fit Line

What does an animal's gestation period have to do with its longevity? Use residuals to determine the prediction errors based upon a least-square regression line. This second instructional activity on residuals shows how to use residuals...

Pupils work through a guided activity on fitting a linear equation to a set of data by entering the data into a calculator and trying to envision a line of best fit. They then have the calculator determine the least-squares line and...

Discover how trend lines can be useful in understanding relationships between variables with a lesson plan that covers how to informally fit a trend line to model a relationship given in a scatter plot. Scholars use the trend line to...

How do you create a residual plot? Work as a class and in small groups through the activity in order to learn how to build a residual plot. The activity builds upon previous learning on calculating residuals and serves as a precursor to...

How does the calculator find a regression line? Don't leave your pupils wondering! The video goes through the process of calculating a regression line algebraically. The example uses a data set and use the formula for calculating the...

A video lesson on using the least squares approximation to find the line of best fit for a set of points. Includes a concrete example dealing with a set of 4 points. Finds the equation to the line that is the best approximation of a line...

This lesson will demonstrate finding the least-squares line. It is 4 of 4 in the series titled "Finding the Least-squares Line." [5:54]

This lesson will demonstrate finding the least-squares line. It is 1 of 3 in the series titled "Finding the Least-squares Line." [7:13]

This lesson will demonstrate calculating the slope and y-intercept for a least-squares line.

Residual plots let you find the perfect line of best fit. As users adjust the points on a scatter plot and a possible line of best fit, the interactive automatically changes the residual plot. This change allows them to see connections...