Given that $(3,4)$ is a point on the graph of $y = f(x)$, what point must be on the graph of \[y = -4f(-2x) + 3?\]

please help @melody

The answer is (-6, -1/3).

I found out the answer here http://dl.uncw.edu/digilib/Mathematics/Algebra/mat111hb/functions/graphs/graphs.html artykul You can use this one next time