$\"\"$

The differential equation is $\"\"$ .

Slope field is $\"\"$ .

As $\"\"$ , $\"\"$ .

The slope field is $\"\"$ as $\"\"$ tends to $\"\"$ .

Observe the graphs:

Graph (a) has slope field $\"\"$ as $\"\"$ .

Therefore, the correct choice is graph (a).

$\"\"$

Graph (a).