Stretcher/Shrinker Tool
This file shows how multiplication as scaling works.
Stretch or shrink (scale) the original green frog by dragging the mulitplier, or scale factor, S (blue point on the horizontal axis).
Change the height of the original green frog by dragging the height, H (green point on top of green frog's head).
The height of the new red frog is S x H.

Questions for experimentation:

What happens when you switch the values of scale factor and height? For example, switch H=2 and S=3 to H=3 and S = 2.

What happens when the scale factor is between 0 and 1?

What happens when one of the factors (scale factor or height) is negative?

What happens when both of the factors are negative?