Answer:
a. The graph shows a positive slope.
You have to look at it from left to right. If the line starts going up, it's positive, if it goes down, it's negative.
b. A few other points are (-2, -7), (-1, -4), and (2, 5)
c. The graph has a slope of 3. You have to count up and then to the side It's rise over run. For example looking at the given points (0, -1) and (1, 2). You start at point (0, 1) count up (the rise) until you're level with (1, 2) and then count to the side until you're on point (1, 2)(the run). The rise you get 3 and the run is 1.
3 over 1 is 3.
Let me know if you need any more clarification.