The scatter plot below shows the relationship between the weekly hours spent on social media and the weekly hours spent reading, by the students of a middle school:

A scatter plot is shown titled free time activities. The x-axis is labeled hours spent reading. The y-axis is labeled hours spent on social media. Data points are located at 0 and 8, 2 and 8, 4 and 5, 6 and 3, 6 and 5, 6 and 7, 9 and 4, 10 and 2. A line connects the points 0 comma 8 and 10 comma 3.

What is the y-intercept of the line of best fit, and what does it represent?

6 hours; the number of hours students read when they do not spend time on social media
6 hours; the number of hours students spend time on social media when they do not read
8 hours; the number of hours students read when they do not spend time on social media
8 hours; the number of hours students spend time on social media when they do not read