This type of function transformation is called vertical scaling or vertical stretching/compression. On a graph, it results in the function being stretched away from or compressed towards the x-axis, depending on whether the value of k is greater than or less than 1, respectively.
Consider the relationship between y = f(x) and y = kf (x).
What is this type of function transformation called? What does it look like on a graph?
Answer both in one short sentence each.
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