3.4 Graphing Techniques; Transformations. (0, 0) (1, 1) (2, 4) (0, 2) (1, 3) (2, 6)

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Presentation transcript:

3.4 Graphing Techniques; Transformations

(0, 0) (1, 1) (2, 4) (0, 2) (1, 3) (2, 6)

(0, 0) (1, 1) (2, 4) (0, -3) (1, -2) (2, 1)

Vertical Shifts c>0 The graph of f(x)+c is the same as the graph of f(x) but shifted UP by c. For example: c = 2 then f(x)+2 shifts f(x) up by 2. c<0 The graph of f(x)+c is the same as the graph of f(x) but shifted DOWN by c. For example: c = -3 then f(x)+(-3) = f(x)-3 shifts f(x) down by 3.

Horizontal Shifts If the argument x of a function f is replaced by x-h, h a real number, the graph of the new function y = f(x-h) is the graph of f shifted horizontally left (if h 0).

Reflections about the x-Axis and the y-Axis The graph of g= - f(x) is the same as graph of f(x) but reflected about the x-axis. The graph of g= f(-x) is the same as graph of f(x) but reflected about the y-axis.

Compression and Stretches The graph of y=af(x) is obtained from the graph of y=f(x) by vertically stretching the graph if a > 1 or vertically compressing the graph if 0 < a < 1. The graph of y=f(ax) is obtained from the graph of y=f(x) by horizontally compressing the graph if a > 1 or horizontally stretching the graph if 0 < a < 1.