To factor this you need values that add up to 2 and multiply to -15
So you get 5,-3 then you put it into your equation for you b value
X^2+5x-3x-15
Then you can factor by grouping
X(x+5)-3(x+5)
So your factors are
(X+5)(x-3)
All you do is make 3/4 into 12/16 and 12 is your answer.
B is the answer to your question!
Please mark brainliest if this helped!
Your answer should be A. Y=3x-1