Kinesthetically graphing a line on a grid

This activity only works if you have a rather large group of people. Draw a coordinate system on the ground (with chalk outside or tape inside). Ask each person to sit at a point on the grid and identify the coordinates of their point.

Then hold up a simple linear equation. Ask each person whose coordinates make that equation true to stand up. You now have a living line.

You can do with with an equation depending on the ability level of the students.