help again, please

[sky]

when david started out on his trip, his odometer red 45973 and his fuel gauge read 7/8 full. exactly 1 h 48 min later, the odemeter read 46081 and the fuel guage read 1/2 full.
> under what conditions does it seem reasonable that the odemeter reading would be a linear function of the fuel gauge reading ?

i don't understand this question, please explain it to me
thanks

[manheim]

It's asking how (aka conditions) the amount of fuel in the car can change in a linear pattern to the miles driven by the car.

I don't know much about cars, but you would have to have good engine efficiency to you get the mileage for the amount of gas. It would not be a linear function if the gas being used up didn't contribute to the movement of the car. If this is physics then you'd have to think about those other factors, such as piston friction, spark plug ineffeciency, etc that lead to not getting the mileage.

Of course you'd hope that your're not leaking gas either:D

What class is this coming from, it helps to relate the class to the question?

Hope this helps;)

[yeudoi]

I would say driving under constant speed/velocity that the odemeter reading would be a linear function of the fuel gauge reading. This is when no fluctuation in the amount of throttle, which means that the flow will theoretically constant.

I would assume that driving on a horizontal flat surface.

[Trung Quốc]

Originally posted by yeudoi
I would say driving under constant speed/velocity that the odemeter reading would be a linear function of the fuel gauge reading. This is when no fluctuation in the amount of throttle, which means that the flow will theoretically constant.

I would assume that driving on a horizontal flat surface.

Yup, anh yeudoi is correct, have to drive under constance velocity. :)

QT