9. Since x_{0} = y_{0} , we have x_{n} =
y_{n} for all n. Consequently, a_{n} = x_{n} for all n,
and so the delay plot of a_{n+1} versus a_{n} will look exactly
like that of x_{n+1} versus x_{n} - that is, the points will lie
on the graph of the logistic map.

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