An Organization Determines That the Cost Per Person of Chartering $C ( x ) = \frac { 200 + 7 x } { x }$

Multiple Choice

An organization determines that the cost per person of chartering a bus is given by the formula $C ( x ) = \frac { 200 + 7 x } { x }$
where x is the number of people in the group and C(x) is in dollars. Find a formula for the inverse of this functio

A) $C ^ { - 1 } ( x ) = \frac { 200 } { x + 7 }$
B) $C ^ { - 1 } ( x ) = \frac { 7 } { x - 200 }$
C) $C ^ { - 1 } ( x ) = \frac { 200 } { x - 7 }$
D) $C ^ { - 1 } ( x ) = \frac { 200 + x } { 7 }$