Answer: 12. 1.25 = slope
13. -1/2 = Slope
14. Take two points from the line on the graph and then use the slope formula, y2 - y1/x2 - x1 to get your slope.
15. Use the points in the equation y2 - y1/x2 - x1 to get your slope. Remember to simplify.
Explanation:
12. = -6 - 9/ -8 - 4 = 1.25 = slope
13. =-10 - (-3)/9 - (-5) = -1/2 = Slope