D. Is the correct answer because the change in x is + 2 and change in y is -2 and they stay consistent each time so the graph would be a continuous straight line which would be linear and doesn’t overlap with 2 points and a bother way you could look at it is if the same x has 2 different y’s that wouldn’t be a straight linear line!!
The rest of the problems do not have a consent rate of change, but D has a consent rate of change, being x is increasing by positive 2 and y is decreasing by negative 2. hope this helps :)
