Answer:
omggg he looks like a stuffed animal
Make it go higher the height of the roller caster will gain more potential energy than a short so go high
Yes it represents a function.
Make a circle and then another circle. There should be a oval in the middle.
Like this:
https://docs.google.com/drawings/d/10jIdkQW5rnxfDS9T2WeqkwRTvl92oJsYkXVLj8Zn6hU/edit