The line that is parallel must have the same slope as the given equation.
So, the slope must be -2. Let's find the slopes of the answer choices to figure out the answer.
slope of f: (3-1)/(2-1) = 2
slope of g: -1/2
slope of h: 4(-1)/2 = -2 but it is actually the same exact line so it can not be parallel
slope of j: 1(-1)×2 = -2
answer: J
