Unit 5 Contents

If the points on a graph lie close to a line, you can draw a line to help you make predictions. This line is called a best-fit line.

1. Why do you think the line drawn on the graph is called a best-fit line?
2. How many points on the graph are above the line?
3. How many points are on the line?
4. How many points are below the line?
10. Use this graph to estimate the winning time for the mile run in 1955.
11. If the mile had been run in the college championships in the year 2005, predict the winning time. Explain how you made your prediction.