Question

Please help. I think its B since the y-intercept is -1 and it rises up 3 and goes over 1 so that means it is just 3.

Answer 1

You are correct about the y-intercept. In case you are unsure about the slope, you can check using y1 - y2 / x1 - x2:

(0, -1) and (1, 2)

-1 - 2 / 0 - 1
-3 / -1
3

The slope is 3; you chose the correct answer, great job.