Question

what is a line of best fit used for?
to make it look like you know what you are doing
to make predictions
to make the graph look pretty
to connect the points

Explanation:

A line of best fit is a straight line that best represents the data on a scatter plot. Its main purpose is to show the trend of the data points and is used to make predictions about future data points based on the existing data pattern.

Answer:

To make predictions