How do you graph $r=2$?

Hint: As the given $r=2$ is the radius of the circle. So we will first draw a point which is the center of the circle and then we draw a circle by setting the compass to the radius 2 cm from the center.

Complete step by step answer:
We have been given $r=2$.
We have to plot a graph for the given equation.
We know that a circle is a shape consisting of all points in a plane that is a given distance from a given point, the center.
Now, let us assume that C is the center of the circle and r is the radius of the circle. We have $r=2$ so let us draw a circle from the given point.
Let us first draw a point that is the center of the circle. Then we will get

Now, set a compass as radius 2 cm and draw a circle from the center. Then we will get

Hence above is the required circle.

Note: The point to be noted is that all points are the same distance from the center. The diameter goes straight across the circle through the center. The circumference is the distance once around the circle. A line segment that passes from one point to another on the circle’s circumference is called a chord and a part of the circumference is called an arc of the circle.