The function is $\"\"$ , where $\"\"$ is the number of months since January.

Rewrite the function as $\"\"$ .

Here $\"\"$ represents the month January and $\"\"$ represents the month December.

(a)

Graph of the function $\"\"$ :

(b)

All possible values of $\"\"$ is domain of the function.

$\"\"$ is the number of months since January.

Relevant domain of the function is $\"\"$ .

Observe the graph:

All possible values of $\"\"$ is range of the function.

Range is $\"\"$ .

(c)

Observe the graph: Approximate $\"\"$ -intercept is $\"\"$ .

Find the $\"\"$ -intercept by substituting $\"\"$ in $\"\"$ .

$\"\"$

The $\"\"$ -intercept represents the initial stock fluctuation percentage.

(d)

Zeros of a function is $\"\"$ -intercepts.

Observe the graph: $\"\"$ -intercepts of the function are $\"\"$ and $\"\"$ .

Zeros of the function are $\"\"$ and $\"\"$ .

The zeros are represent the months when stock price returned to its original value.

(a)

Graph of the function $\"\"$ :

(b) Relevant domain of the function is $\"\"$ and range is $\"\"$ .

(c) $\"\"$ -intercept is $\"\"$ and it is represents the initial stock fluctuation percentage.

(d) Zeros of the function are $\"\"$ and $\"\"$ and they represent the months when stock price returned to its original value.