The y-intercept of the line of best fit is 6.9 hours. This represents the estimated number of hours students spend watching television in a week when they do not spend time with friends. Option A
How to determine line of best fit
The y-intercept is an important idea in linear regression. It is used to model the relationship between two things in statistics. In this situation, the y-intercept shows where the line starts when the number of hours spent with friends each week is zero.
In the graph described in the question, if students don't spend any time with friends during the week, it's estimated that they watch 6. 9 hours of TV.
The line of best fit is a line that shows the general pattern or connection between two things (like how much time people spend watching TV each week and how much time they spend with friends) using the information we have.