Precalc0103to0104-page32

Precalc0103to0104-page32 - (Section 1.4: Transformations)...

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(Section 1.4: Transformations) 1.4.8 • For any x -value in 0, ± ² ³ ) , such as 1, the corresponding y -coordinate for the y = x graph is doubled to obtain the y -coordinate for the y = 2 x graph. This is why there is vertical stretching . • Similarly, the graph of y = 1 2 x exhibits vertical squeezing , because the y -coordinates have been halved . § Example 8 (Horizontal Stretching and Squeezing; Revisiting Example 7) Again, let fx () = x . Now consider the form y = fc x . The graph of y = f 4 x is the graph of y = 2 x in blue , because: f 4 x = 4 x = 2 x . The vertical stretching we described in Example 7
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This document was uploaded on 12/29/2011.

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