Answers

1. Answer:

   f(t) = 160t,

   d = f(t)

   The function that relates the distance traveled d to the time t is:

   f(t) = 160t, where d = f(t)

   Step-by-step explanation:

   If the train travels 480 kilometers in 3 hours, then it will travel 160 kilometers in one hour:

   d = 160t

   Now we replace d by f(t) because d = f(t):

   f(t) = 160t

   for any given value of t, d will be equal to t multiplied 160 times

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