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If the point $(2,9)$ is on the graph of $y=f(x)$, then there is one point which must be on the graph of $y=f(-x)$. What is the sum of that point's coordinates?

 Jul 23, 2018
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f(-x)  reflects the  graph of f(x) across the y axis.....the  x coordinate becomes  - 2  and the y coordinate remains the same

 

So....the point (-2, 9)   is on the graph  of  f(-x)   and the sum of these coordinates is  7

 

cool cool cool

 Jul 23, 2018

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