Question

Consider a function that describes how a particular car gas mileage depends on its speed. What would appropriate domain for this function?

A. 0 to 100 per hour
B. 0 to 50 miles per gallon
C. Times from 0 to 10 minutes
D. Times from -10 to 10 minutes

Answer 1

0 to 100 miles per hour

Answer 2

Answer: A. 0 to 100 per hour

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Step-by-step explanation:

The phrasing "Depends on its speed" tells us that the speed is the independent variable, and therefore it's the x variable.

The domain is the set of allowed x values of a function, or allowed inputs. In this case, it appears the car's max speed is 100 mph.