How has enculturation changed since the American Civil Rights movement? Children go to schools segregated by ethnicity.
O People are expected to live in inclusive societies.
O There have been many significant demographic shifts.
O Factory work is no longer the norm in the United States

First of all the reason the graph would be a curve is because, as the time increases the position changes, at first the ball is at a certain point then it starts rolling off a cliff so its moving foward and then the ball starts falling, (If too confusing here is a image http://www.mazzworld.net/U11Image1.gif)