Choose the Logistic Function That Best Approximates the Given Curve $f ( x ) = \frac { 10 } { 1 + 9 \left( 5 ^ { - x } \right) }$

Multiple Choice

Choose the logistic function that best approximates the given curve.

A) $f ( x ) = \frac { 10 } { 1 + 9 \left( 5 ^ { - x } \right) }$
B) $f ( x ) = \frac { 10 } { 1 + 4 \left( 5 ^ { - x } \right) }$
C) $f ( x ) = \frac { 10 } { 1 + 4 \left( 0.5 ^ { - x } \right) }$
D) $f ( x ) = \frac { 10 } { 1 + 6 \left( 0.5 ^ { - x } \right) }$
E) $f ( x ) = \frac { 10 } { 1 + 9 \left( 0.5 ^ { - x } \right) }$