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Anoki is trying to determine how long it will take him to drive to the comic-book convention 450 miles away. His average speed will not exceed the 70 mile per hour speed limit. The time, t, it takes Anoki to drive 450 miles varies inversely as his average speed, s, increases or decreases. Which of the following describes the function of the time in hours determined by the average speed and its domain?

Answer :

It's important to know that the correct function is

[tex]t=\frac{450}{s}[/tex]

Because the variables variate inversely.

Also, the domain has to be

[tex]0Because the average speed can't exceed 70 miles per hour.

Hence, the answer is the third option.

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