Find the Exponential Model That $y = a e ^ { b x }$

Multiple Choice

Find the exponential model that $y = a e ^ { b x }$ fits the points shown in the table. $\begin{array} { | l | l | l | } \hline x & 0 & 4 \\\hline y & 15 & 3 \\\hline\end{array}$

A) $y = 15 e ^ { 05024 x }$
B) $y = \frac { 1 } { 15 } e ^ { - 0.6024 x }$
C) $y = 15 e ^ { - 0.4024 x }$
D) $y = - \frac { 1 } { 15 } e ^ { 0.4024 x }$
E) $y = - \frac { 1 } { 15 } e ^ { - 0.4024 x }$