Let $L_1$ be the line containing points $(0,-3)$ and $(-7,8),$ and let $L_2$ be the line containing points $(2,-1)$ and $(16,-23)$ Find the slope of each line

The slope of $L_1=$

The slope of $L_2=$

Which one of the statements below is correct?

A$.$ The two lines are parallel.

B$.$ The two lines are perpendicular.

C$.$ The two lines are neither parallel nor perpendicular.