When the input is 2, which function has the greatest output?

I've never been good at math he told he loves but he keeps cheating on me, so it ain't adding up sis

Harry’s soccer team plays 2 nonconference games for every 3 games that they play against conference opponents. if y represents the number of nonconference games and x represents the number of conference games, which equation best models this proportional relationship? a)y=2/3 x b)y=3/2 x c)y = 2x d)y = 6x

What statement is true? 2x^2-9x+2=-1