Line of Best Fit

Explore the sketch. Use it to get a feel for drawing in the line of best fit.
1) What's the equation of the best fitting line you can find that goes through at least one point? What's the "fit measure" of this line? Which point did you have the line go through? 2) What's the equation of the best fitting line you can find-- if the line does not have to pass through any points? What's the "fit measure" of this line?