Sorry, another quick question. If I have a particle confined in a region of space -4 <= Z <=6 where psi(x)= A(4+z), -4<= z <=1 A(6-z), 1<= z <=6 0 , everywhere else And I sketch the wavefunction based on the above definitions, what is the actual equation for the wavefunction? The graph gives a peak at z=1 and slopes down to zero either side. Is this supposed to represent a sin(x) function, or am I supposed to just take the above definitions and fit them into the equations for expectation values? I don't think these equations would work in the equation for expectation values.