Which function is the best represented by graph ?

Plzzz plzz maths ! quadratic sequences =an^2+bn 1) 1,6,15,28,45 2)5,18,39,68,105 3) 1,8,21,40,65 4) 7,24,51,88,135 5) -1,2,9,20,35

Can you simplify 4/7? 24 points will be awarded!

The table represents a function. what is f(-2)? a.-3 b. -1 c.1 d.3