If the lines are parallel, that means that the slope is the same and in this case the slope is 1/2. The format of the equations are point-slope form: y-y1=m(x-x1). m stands for the slope so we can eliminate the 2nd and 4th option. x1 and y1 stand for a point (x1, y1). and we can replace that with the given information (3,5). Then we can rewrite the whole equation using the given info. y - 5 = 1/2 (x -3).
