Question 312926
An anthropologist drives a car at a speed of 30mph along a straight road in Giza Egypt while on a discovery trip. The distance D(t) traveled by the anthropologist as a function of time t is given as D(t)=30t. 
1) What variable represents the domain and which variable represents the range in this problem?
Domain: t
Range: D(t)
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2) What does the value 30mph represent in this function? Explain
Ans: 30  is the slope.
For each increase of 1 for "t", D(t) increases by 30.
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3) the Initial position of the anthropologist's vehicle at the start of time is t=0. Use the given function to find D(3). Explain what your answer means.
D(3) = 30*3 = 90 miles 
When the car travels for 3 hrs at 30mph the distance traveled is 90 miles.
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4) If you were to graph D(t), what would be the appropriate domain? range? Explain.
Domain: t >= 0
Range: D(t)>= 0
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Cheers,
Stan H.