Ray tracing to determine location of image? What is this and how do I do it?

Question

An object is 6.0 cm in front of a converging lens with a focal length of 10 cm .

Use ray tracing to determine the location of the image.

Answer 1

This must be done to scale so pick a scale and position the lens, the focal points (both sides f the lens) and the object. First draw a line (1) straight to the center of lens from the tip of the object then down through the focal point (2). Extend the line the other direction as well (dotted line extending from 2). Then draw a line (3) from the tip of the object through the center of the lens. Extend it the other direction as well (dotted line extending from 3). Where they intersect is the tip of the image. Then using the scale you created, measure the distance to the image.