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Multiple Choice
If the graph of is transformed to , what is the scale factor of the dilation?
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Identify the original function and the transformed function. The original function is \(y = \sin(x)\) and the transformed function is \(y = 3\sin(x)\).
Understand that the transformation involves a vertical dilation (stretch or compression) of the graph of the sine function.
Recall that a vertical dilation of a function \(y = f(x)\) by a scale factor \(a\) results in \(y = a f(x)\), which stretches the graph vertically by a factor of \(a\) if \(a > 1\), or compresses it if \$0 < a < 1$.
Compare the coefficients of \(\sin(x)\) in the original and transformed functions. The original coefficient is 1, and the transformed coefficient is 3.
Conclude that the scale factor of the vertical dilation is the ratio of the new coefficient to the original coefficient, which is \$3 / 1 = 3$.