If Y Varies Inversely as X, Find the Inverse Variation $\frac { 9 } { 5 }$

If y varies inversely as x, find the inverse variation equation for the situation.
-If the force acting on an object stays the same, then the acceleration of the object is inversely proportional to its mass. If an object with a mass of 45 kilograms accelerates at a rate of 9 meters per second per second by a force,
Find the rate of acceleration of an object with a mass of 9 kilograms that is pulled by the same force.

A) 36 meters per second per second
B) 45 meters per second per second
C) 40 meters per second per second
D) $\frac { 9 } { 5 }$ meters per second per second