Answer:
bottom right graph
Explanation:
Line of best fit is a line that is created on a graph with a bunch of points. This line must fall somewhat close to a majority of the points, or else it wouldn't be of "best fit".
The top left graph has the line maybe going through 2-3 points.
The top right graph has the line going through 0 points.
The bottom left graph goes through none.
So the answer is bottom right.
Hope this helps! :)