Question

help @Jhannybean @amistre64 @terenzreignz

Answer 1

i think its a, b and c

Answer 2

Lets say each tick-mark was a unit of 1. So just input the points

D= (4,1)
F=(4,-3)
E= (-4,-3)

Into your equation \(\large \frac{x^2}{9}+\frac{y^2}{4}\ge 1\)

See if these points are greater or equal to 1.