Answer: 3/-4
The slope is measured in terms of rise over run. Rise is how many units you go up or down from the point (0, 0). Run is how many units you go left to right from the point where rise left off. For this question, we go up 3 and to the left 4. SO that's a 3 on top and a -4 on the bottom.
I hope this helps! :) I'm a huge Algebra nerd!!! I love Algebra. :)