No it isn't. The wheel is rotating relative to the car - but I am on the ground. the centre of the axle is moving in a straight line.if the wheel is revolving, and the tyre is attached to the wheel, then every point of the wheel is revolving
No, Santa. If it is a driven axle, then yes, it will travel in a straight line, but will still rotate. If it is an undriven axle, then it too will travel in a straight line, but with the wheel revolving around it. Your comment about this brings me to the question that, taking your original premise into account, how would you expect it to behave? Either driven or not.