Answer
a. See graph below
b. See explanation below
Work Step by Step
a. It justs asks for a graph of $f(x) = 9^{\frac{x}{2}}$ and $g(x) = 3^x$ Graph is attached below, but there is only one color present because both graphs are the same function!
b. $f(x) = 9^{\frac {x}{2}} = 3^{(2 * \frac{x}{2})}$
Laws of exponents: $9 = 3^2$, you can multiply powers with the same base
Thus $f(x) = 3^x$
