Final answer:
The equation y= -x + 175 describes the distance left to Oak Glen as a function of x, the distance traveled since leaving Bay Town. The domain represents the distance traveled, where x≥0.
Step-by-step explanation:
The distance between Bay Town and Oak Glen is represented by the equation y= -x + 175, which describes the distance left to travel to Oak Glen as a function of x. In this context, the variable x represents the distance that has been traveled since leaving Bay Town, while y represents the remaining distance to Oak Glen. The domain of the function, which is the set of all possible values of x, corresponds to the distance already traveled. Hence, the domain represents all non-negative values of x (x≥0) because you cannot travel a negative distance.
The correct answer is D) Distance traveled since leaving Bay Town; x≥0. This interprets x as the amount of distance already covered since the journey started, and constraints represent the fact that the traveler cannot undo the distance already covered, hence x must be greater than or equal to 0.