Suppose that the function y = f(x) is decreasing on the interval (− 2, 7).
(a) Over what interval is the graph of y = f(x + 2) decreasing?
(b) Over what interval is the graph of y = f(x − 5) decreasing?
(c) What can be said about the graph of y = −f(x)?
(d) What can be said about the graph of y = f(− x)?
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