7. Knowing the time series comes from either the tent map or the logistic map,
find three points of the delay plot (all with x_{n}-coordinate less than 1/2).
If the points lie on a straight line, the time series comes from the tent map.
Three appropriate points are (0.268, 0.510), (0.130, 0.247), and (0.247, 0.470).
The slope of the line through the first two is 1.906, and the slope of the line
through the second two is 1.906. Since both lines share the second point, they are
the same line. Consequently, the time series comes from the tent map.

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