okay, with a slope of 2 given, you can eliminate A and B.
what you do is multiply the x by the slope.
x is 9, slope is 2. 9 x 2 = 18.
then you try to find intercept by seeing what needs to be added or subtracted to get -2.
18+b=-2
subtract 18 on both sides
18-18+b=-2-18
0+b=-20
b=-20
this makes y=2x-20
