Answer:
(6, -3) and (-4, -3) Zero Slope
(3, 5) and (-1, 2) Positive Slope
(2, 4) and (5, 1) Negative Slope
(-7, 8) and (-7, 0) Undefined Slope
Step-by-step explanation:
TL;DR
1. Zero
2. Positive
3. Negative
4. Undefined
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