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If a > 0, it is stretched, in the vertical direction, by the factor a

If a = 1 it is unchanged

If 0 < a < 1, it is shrunk bt the factor a

If a = 0, it is coincident with the x-axis

If a < 0 then as above, but it is also reflected about the x-axis (turned upside down).

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14y ago

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