Asian Posted January 19, 2007 Posted January 19, 2007 why is y=-f(x) a reflection of the graph y=f(x) accross the x-axis?
Bignose Posted January 19, 2007 Posted January 19, 2007 I bet you can answer this yourself... pick a few test functions and plot them for yourself. E.g. plot y=cos(x) and y=-cos(x) on the same graph and take a look. I bet you'll see why its a reflection pretty quick.
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