Which of the following are point-slope equations of the line going through (3, 6) and (1, 2)? Check all that apply, there's more than one answer .
A.y - 2 = 2(x + 1)
B.y - 2 = 2(x - 1)
C.y - 6 = 2(x - 3)
D.y - 6 = 1/2(x + 3)
E.y - 6 = 1/2(x - 3)
F.y - 2 = 1/2(x - 1)

Question

Which of the following are point-slope equations of the line going through (3, 6) and (1, 2)?  Check all that apply, there's  more than one answer . 
A.y - 2 = 2(x + 1)
 B.y - 2 = 2(x - 1) 
C.y - 6 = 2(x - 3) 
D.y - 6 = 1/2(x + 3) 
E.y - 6 = 1/2(x - 3) 
F.y - 2 = 1/2(x - 1)

directrix · Answer

Use the slope formula to get m in y = mx + b.

m = (6-2) /( 3-1) = 4/2 = 2/1 or just 2.  Think of slope as rise over run.