11. Simplify the complex fraction.
n-4
n² - 2n-15
n +1
n +3
n-4
(n-3)(n+1)
n-4
(n-1)(n+3)
n-4
(n-5)(n+1)
(n-4)(n+3)
(n-5)(n+1)

Which of the following best describes the graph below? + + 2 + 3 + 4 1 o a. it is not a function. o b. it is a one-to-one function. o c. it is a many-to-one function. o d. it is a function, but it is not one-to-one.