Eila is walking. D(t), given below, is her distance in kilometers.
D(t) = 13.5 - 5t
Complete the following statements.
Let D^(-1) be the inverse function of D.
Take x to be an output of the function D.
That is, x = D(t) and t = D^(-1)(x).
(a) Which statement best describes D^(-1)(x)?
The ratio of the amount of time she has walked (in hours) to the distance from Tomsville (in kilometers), x.
The reciprocal of her distance from Tomsville (in kilometers) walking x hours.
The amount of time she has walked (in hours) when she is x kilometers from Tomsville.
Her distance from Tomsville (in kilometers) after she has walked x hours.