Graph
For example, say you were 60 centimeters tall at age 1, 85 centimeters tall at age 2 and 95 centimeters tall at age 3. You would draw an imaginary straight line passing through the 50 centimeters height mark on the vertical axis. Then you would draw a second imaginary line passing through the age of 1 year on the horizontal axis. At the place where the two imaginary lines meet (called their intersection), you would then draw a dot. Really, the imaginary lines are usually replaced by graph paper (see below). The drawing of this intersection is called "plotting the point 50 centimeters for year 1".