Unit 5 - Day 1

Unit 5

Day 1: 

Students will use the line of best fit to find equations of lines.

The line of best fit is a line that crosses at least two points on a graph and has around the same number of points above it as below it.

This picture is a good example of
what a line of best fit looks like.

Quiz

1. Using Figure 1 draw a line of best fit.

Figure 1

Figure 2

2. Draw a line of best fit for Figure 2.
3. Using Figure 1 find the slope with the line of best fit.

Answers

1.

2.

3. First find the points (12,200) and (22,500) that were plotted on you're line of best fit. Then use the equation m=y2-y1/x2-x1 with y2 being 500, y1 being 200, x2 being 22, and x1 being 12 to find the slope. The slope is 30.