8.SP.2  Scattter Plots and Best Fit Lines  Know that straight lines are widely used to model relationships between two quantitative variables. For scatterplots that suggest a linear association, informally fit a straight line, and informally assess the model fit by judging the closeness of the data points to the line.

The table from 8.SP.1made this graph

This is just the data converted to points and the points put onto a coordinate plane.

And this is the best fit line for the graph

The bestfit line sort of "splits" the data down the middle and shows a trend as to what the data would be like if you had to use a line to describe it.
