Graphing Functions Practice Test

Let $f(x) = ax + b$ and $g(x) = x^2$. If $(f \circ g)(2) = 11$ and $(g \circ f)(2) = 49$ with $f(2) > 0$, what is the value of $a$?

Let $f(x) = \dfrac{2x - 1}{x + 3}$ and $g(x) = \dfrac{x}{x - 2}$. Which of the following is $(f \circ g)(x)$?