$\"\"$

Observe the graph:

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

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

So, the domain is the all real numbers and range is all real numbers greater than or equal to $\"\"$ .

Because, the line increases from $\"\"$ -axis at $\"\"$ units and $\"\"$ -axis at $\"\"$ units.

Therefore, the line increases from both sides of $\"\"$ . $\"\"$

Domain is all real numbers.

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