Adevice that displays the continuous plot of a wave called

The correct answer is Oscilloscope.

Explanation:

An Oscilloscope is a device used to graph variable signal voltages. It can also convert to voltages and show a sound or a vibration.

What they do is show how an electrical signal changes over time. You can show the shape of a wave, by analyzing its amplitude, frequency, distortion, etc. and it can be adjusted so that we can continuously see the repetitive signals.

well seeing i am an artist and i actually did a self portrait; i will describe how i painted it.   i used acrylic on a stretch canvas about 4 feet wide by 6 feet tall. i painted myself smiling in a soft pink long dress, white tile floor sitting on a white couch with a table behind and a vase of gorgeous flowers.   i also had a round white hat with a soft pink ribbon through it laying on the floor and on the table behind me was a lit candle. i kept it simple but soft and romantic.

i believe their role is to instruct certain sections on when they are to join and when they are to stop