$\"\"$

The differential equation is $\"\"$ .

Slope field is $\"\"$ .

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

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

Observe the graphs :

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

Therefore, the correct choice is graph (d).

$\"\"$

Graph (d).