Question

A train travels in a straight path at a steady speed of 1.25 miles per minute. At noon, the train is 100 miles from the starting point. Express the distance D from the starting point as a function of time, x, in minutes after noon.

Answer 1

SOS

Answer:

D. D = 100 + 1.25x

Hope this helps!!

Answer 2

We'll take 1.25 miles as one minute (x) and take 100 as total distance (D) while T is the time it took to reach that distance.
T = D/x
putting the values in
T = 100/1.25
T = 80
80 minutes is the answer.