a. your altitude as a function of time while flying from reno to dallas?
b. time to travel from miami to pensacola as a function of driving speed?
c. number of tennis balls that can fit completely inside a particular box as a function of the radius of the tennis balls?
d. area of a circle as a function of radius.
The function which is not continuous is C. number of tennis balls that can fit completely inside a particular box as a function of the radius of the tennis balls. The reason for this is because the number of these balls is discreet, not continuous (meaning that there cannot be 6.5 balls).