To make a line taper in Illustrator, follow the steps given below:
- Set the Stroke color to Black and Fill color to OFF
- Grab a pen tool and then draw a simple curve
- Click on Window from the menu bar
- Select Stroke and then enter your ideal line weight
- Tap on the Option button present in the Stroke Dialog box
- Tap on Profile and then choose a Stroke of your liking
- As soon as you choose a stroke type, your line gets that tapper effect and shape.