B, because the lines connect at (1,-4) and (4,-1)
-8d – 5d + 70 = 72
-13d + 70 = 72
-70 -70
_______________
-13d 2
___ = ___
-13 -13
d = -0.15 (<em>rounded</em>)
I think it might be 20%. If in a total of 10 days it only snowed 2, then you could take 2/10, which is .2, then multiply by 100 to make it a percentage... which would be 20%.
