Is this a function or no??

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

The system of equations graphed below has how many solutions? y = 2x + 2

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)