In a physics experiment, various masses were suspended from a spring. The stretching distance of the spring is

recorded for each case.

Mass (g) 50 100 150 200 300 500 750

Stretch Distance (cm) 1.2 2.5 3.2 5.3 7.0 11 16

1. Create a scatter plot and classify the linear correlation using this graph.
2. Determine the correlation coefficient manually.
3. Determine the line of best fit manually in the form y = ax + b.