F={(-1, 2), (3, 2), (4,2), (0, 2)} Is Fa function and why/why not?

If m 17 27 90 63 ** picture is attached

Line segment eg is partitioned by point f in the ratio 1: 1. point e is at e (0, 4), and point f is at (1, 3). what are the coordinates of point g? (−1, 5) (2, 2) (3, 1) (4, 0)

Me i’m stuck on all these questions besides the two bottom ones