The function is $\"\"$ represents the number $\"\"$ of housing units (in millions) that have $\"\"$ rooms, where $\"\"$ is an integer and $\"\"$ .

(a)

Since $\"\"$ is a function of $\"\"$ , $\"\"$ is a independent variable and $\"\"$ is a dependent variable.

Independent variable is $\"\"$ .

Dependent variable is $\"\"$ .

(b)

Evaluate $\"\"$ .

Substitute $\"\"$ in the function $\"\"$ .

$\"\"$

The value of $\"\"$ is $\"\"$ .

In 2005, there are $\"\"$ million housing units that have $\"\"$ rooms.

(a)

Independent variable is $\"\"$ .

Dependent variable is $\"\"$ .

(b)

The value of $\"\"$ is $\"\"$ ; In 2005, there are $\"\"$ million housing units that have $\"\"$ rooms.