In a flash of sheer brilliance, Stefan invents a time machine! The machine uses a small nuclear reactor to generate the electricity it needs to travel back in time. There is a proportional relationship between how many years Stefan wants to travel back in time, x, and how much electricity (in megawatts) his time machine needs, y . ​

In a flash of sheer brilliance Stefan invents a time machine The machine uses a small nuclear reactor to generate the electricity it needs to travel back in tim class=