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Answer:
a. the stretch
Step-by-step explanation:
The function 2f(x+1) -4 represents a vertical stretch by a factor of 2, a horizontal translation left 1 unit, and a vertical translation down 4 units.
Either the horizontal translation or the vertical stretch can be done first, because their effects are independent of one another. If the vertical translation is done first, the stretch will double it—which is not what you want.
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Since the vertical stretch must be done before the vertical translation, it is reasonable to claim the vertical stretch must be done first.
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Additional comment
If you claim the horizontal stretch must be done first, that places no restriction on the sequence of vertical transformations. Hence the graph may be incorrect when only that restriction is applied.
