The line of best fit

A scatter plot puts two measurements against each other: Hours practiced along the bottom, Score up the side, and one dot for each thing measured. This question is about the line of best fit drawn through them.

The number on its own is the intercept — the value when x is 0.

So it is points at 0 hours: the value the line gives at zero Hours practiced.

So the answer is "points at 0 hours".