After driving 30 minutes a mailman is 200 miles from home.  After 75 more minutes, he is 150 miles away from home.

Write a set of parametric equations that represent the mailman's distance from home over time.

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1 Answer

distans at t=30 is 200

D at t=105=150

speed=delta d/delta t=-50/75=-0.6666666666...

distans=220 -(2/3)t
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