The graph of the function
`30 f(x)`
can be obtained from the graph of
` y = f(x) `
by one of the following actions:
vertically compressing the graph of `f(x)` by 1/30
horizontally compressing the graph of `f(x)` by 1/30
horizontally stretching the graph of by `f(x)` 30
vertically stretching the graph of `f(x)` by 30
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