SOLUTION: A car travels at a steady rate of 60 miles per hour. Identify the in depednt and dependent variables. Describe the domain and range. Write to describe the situation. Thanks for

Question 169819: A car travels at a steady rate of 60 miles per hour. Identify the in depednt and dependent variables. Describe the domain and range. Write to describe the situation.
Thanks for all those who help!
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Since we're dealing with speed, let's use the distance-rate-time formula

Start with the given formula

Plug in (this is the speed/rate)

So to find the distance, simply plug in a time value. This means that the time "t" is independent (since the distance does NOT affect the time). However, the distance "d" is dependent since the time value "t" does affect the distance "d"

Domain:

Since a negative time doesn't make sense, this means that the time values must be positive (or zero). So the domain is

Range:

Because the domain is , this makes the range . This makes sense also since a negative distance isn't allowed either.
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