The graph shown above is f(x)=
.
This is a type of power function which is f(x)=
where a is the constant, in this case a is -1 so we get f(x)=
.
In f(x)=
, we put x a very large negative number as x is the denominator (1/very large number), give us very small negative number.
so,
f(x)=

x a very large negative number , f(x) is a very small negative number.
Option C is correct.