Well, first you have to solve each of the answers.
Let's start with A.
y-4=3(x+2)
y-4=3x+6
y=3x+6+4
y=3x+10
This equation let's us know that 3 is the slope and 10 is the y-intercept. If you apply this to each of the equations you can easily obtain the answer. :)
