What is the value of the expression 1/2x(6x9x1)+15

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

Can someone answer it, and plot it, for 20 points and brainliest answer? p. s. they're the same ! : )

Pranza plotted point a in the coordinate plane below.