Day 1: Students will use the line of best fit to find equations of lines. The line of best fit is a line that best represents points on a graph. Then, you use this line to find the slope by using two of the points that the line passes through.

Quiz:

1. Is the slope of the line above negative or positive?

2. Which two points can you use to find the slope of this line?

3.  Should The line of best fit touch all the points on the graph?

Answer Key:

1. The slop of this line is positive.

2. The points you can use to find the slope of this line are the two points that the line of best fit runs through.

3. The line of best fit should not touch all of the points on the graph. 

Line of best fit video: