Imagine that the fuel gauge in a gasoline-powered vehicle moves from a reading of 100% full to 75% full as you drive the vehicle. however, when the gauge indicates that the tank is 75% full, it is actually only 50% full. furthermore, the fuel gauge consistently gives a 75% full reading every time that the vehicle has a 50% full tank. using the terms discussed in chapter 1 and in lecture, how could you accurately describe the fuel gauge?