As we can see in the illustration, Jeff stepped on the end of the board or lever and caused a huge, 600 pound rock to be lifted in the air. The BEST explanation of what happened is

Jeff did work

The rock did work

No work was done because the lever was used

No work was done because the rock was moved vertically

Iread this book last year so take this with a grain of salt.gene jumps from the tree to compete with finny due to the fact that gene is always trying to do better than finny. he is put under the grasp of peer pressure due to finny almost forcing him to do this. ever since he first jumped finny kept pressuring him to jump since he thought gene enjoyed jumping.rather than uses this answer you should probably just reread chapters 3-4

Alinear relationship would look like a straight line on the graph. it could have a positive negative or 0 slope. so it could be a line potentially going in any direction but it must be perfectly straight.