$\"\"$

Observe the graph:

Consider the scale on the graph $\"\"$ -axis and $\"\"$ -axis is $\"\"$ unit.

Hence, the graph extendes to the left and to the right.

So, the domain is the all real numbers.

The line increases from both sides of $\"\"$ .

Therefore, range is all real numbers greater than or equal to $\"\"$ . $\"\"$

Domain is all real numbers.

Range is real numbers greater than or equal to $\"\"$ .