Answer:
A
Explanation:
You need to take a ruler and join the points for A and B. I can't do it here.. C and D are not right because they're incorrectly plotted. If A/B join as a straight line for all the points then it's linear. If they don't (and you find it a little curvy) it's a a quadratic. You can cross check as well but imo it's A.
C and D are out of question. Your only options are A and B. And I find the points joining a straight line so my answer would be A