Using the equal differences method, determine which of the following ordered pairs represent a quadratic function.
1. {(-1.11),(0,6).(1,3).(2.2),(3,3), (4,6).(5,11)}

2. {(-3,-35),(-2,-16).(-1.-9),(0,0).(1.-7).(2.0),
(3.19) }

3. {(1,5). (3.13). (5,29). (7.53), (9,85)}

4. X 5 85 10 -20 -20 -85 -100

5. x -3 25 3 -20 5 -35 Y 10 -5​