1. Show that the following lines are parallel by finding their slopes: L1: (−17,−11) and (−1,−8)
L2: (9,8) and (−7,5)

2. Show that the following lines are parallel by finding their slopes:
L1: (0.25,0.75) and (0.10,0.30)
L2: (0.81,0.11) and (0.70,−0.22)

3. Show that the lines through the following pairs of points are perpendicular by finding the slopes and multiplying them to show that the product of the slopes is −1:
L1: (−17,−11) and (−1,−8)
L2: (2,−4) and (−1,12)

4. Show that the lines through the following pairs of points are perpendicular by finding the slopes and multiplying them to show that the product of the slopes is −1:
L1: (3,2) and (1,−2)
L2: (4,5) and (6,4)

5. Find the slope of the line that is PARALLEL to the line through the given points:
(−3,6) and (7,−4)

6. Find the slope of the line that is PERPENDICULAR to the line through the given points:
(−2,4) and (−1,−3)

7. Find the slope of the line that is PERPENDICULAR to the line through the given points:
(−3,6) and (7,−4)