Opening the paper…
Find the slope of the line through the points and .
Find the slope of the line through the points $(-4,\ 0)$ and $(-3,\ -5)$. A line through $P(1,\ -1)$ has slope $-3$ and passes through $Q(4,\ k)$. Find $k$. Find the slope of the line through the points $(-3,\ 4)$ and $(-2,\ 9)$.