What is the primary purpose of drawing a line of best fit on a scatter plot?

To connect every data point in the plot.

To show the overall trend or pattern in the data.

To calculate the average of the x-values and y-values.

To identify the exact minimum and maximum values.

A scatter plot relates the number of hours a student plays video games and their test scores. If the line of best fit has a negative slope, what does this suggest?

More gaming is associated with higher scores.

More gaming is associated with lower scores.

Gaming has no effect on scores.

It must pass through at least half of the data points.

It must be expressed in the form $y = mx + b$.

It must pass through the origin $(0,0)$.

It must connect the first and last data points.