A vertical shift is a transformation that moves a graph up or down in the coordinate plane by adding or subtracting a constant to the function's output. It does not affect the shape of the graph, only its position.
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A reflection flips the graph over a specified axis, such as reflecting it over the x-axis by multiplying the output by -1.
Scaling: $Scaling$ involves stretching or compressing the graph vertically or horizontally by multiplying either the input or output by a constant factor.