eila is walking. D (t), given below, is her distance in kilome
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)
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
kilometers from Tomsville.
Her distance from Tomsville (in kilometers) after she has w
hours.