Desmos does Regressions!

When you have data to graph in a scatter plot, it is now possible to get the equation of the best fit line using desmos.com (free software/app). You will see the best fit line with equation on the side bar.

Here’s the data set for the grade 9 math candle investigation. It’s possible to make the equations of the lines of best fit by calculating the slope and y intercept, but it’s also possible to use desmos to help you check your work.

The nitty gritty:
You need to enter your data in a table first. The headers of the columns will be x1 and y1.

To do a regression create an expression and type in y1~mx1+b and the line of best fit will appear. It is a new feature of desmos, and a very useful one too!