1. Find the midpoint of the segment with endpoints at (-2, -1) and (0, 9). Show your work.

2. Find the length of the segment with endpoints at (2, 7) and (8, -1).

3. Find the slope of the line that goes through each pair of points:(5, 7) and (-4, -2) .
Show your work.

4. Use the slopes (5, 7) and (-4, -2) from the previous question to describe each line as slanting downward, slanting upward, horizontal, or vertical. Explain your answers.