Which is the rule for the linear function graphed below?

F f(x) = -2/3x + 2

G f(x) = -x +2

H f(x) = -3/2x +3

I f(x) = x - 2

Afitness center has 2 membership plans one has a low dollar sign up fee of 15 dollars and costs 38 dollars per month to join. a second plan has a higher sign up fee of 78 dollars but a lower monthly fee of 31 dollars for what number of days of the month is the coat the same