having trouble getting started on this problem. I don't really know what to do first. A learning curve is a function L(x) that gives the amount of time that a person requires to learn "X" pieces of information. Many learning curves take the form L(x) = (x-a)^n + b (for x>0 or x=0), where "a", "b" and "n" are positive constants. Graph the learning curve L(x) = (x - 2)^3 +8.