## College Algebra (11th Edition)

$f(x)=2^x$
First, we have to find the function, by calculating the constant, $a$. If the function contains this point (3,8), then $f(3)=8$, this means: $a^3=8$ We take the cube root of both sides : $a=2$ Therefore, with $a=2$ the function is: $f(x)=2^x$.