I've posted my answer together with the image I think this problem required.
25% is equal to 1/4 or .25 of a whole.
If you do 10 divided by .25 you get 40.
10 is 25% of 40.
A. You divide 1 (infront of x) by 12 to get 12. You divide -6 by 12 to get -2 for the y intercept.