To find the slope of the line perpendicular, you take the reciprocal of the slope of the first line and multiply by -1. So a line with slope is perpendicular to a line with slope -.
In your case, the slope of the line perpendicular is going to be . So yoo know your equation will look like y=x+b. To solve for b, plug in the x and y-coordinates:
b=3
So your final answer is y=x+3. Answer D is correct.