whats the difference between a horizontal compression and vertical stretch or vice versa?

So I m having trouble recognizing the difference between the two since theyre similar in how they look, I can identify which is which if im given the equation but if im given a graph and asked to make the equation i usually cant tell. Is there an easier way to know?

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  • 4 years ago
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    you can't tell from the graph since they will look the same:

    f(x) = x^2

    4 f(x) would be a vertical stretch

    f(2x) is a horizontal compression

    but they both look like 4x^2

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