Can some one plz help fast F=-m+B/q^3

What is the equation of the graph below? y=sec(x)-4

An episode of a television show is 60 minutes long when it originally airs with commercials. on a dvd without commercials, the episode is only 417 minutes long. how many1-minute commercials did the episode include when it originally aired? write and solve an equation to justify your answer.

Can someone me with this problem i don't understand i need