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Unit 5: Lesson Four- Evaluating Polynomial Functions Recall: Function Notation: f x means the same thing as y. So, f ( 2) just means the value of y when x=2. Ordered Pairs: x, y means the same thing as x, f x Note: In your book, they will ask you to verify your answer using “technology” or a “graphing calculator.” Ignore those instructions and just use your calculator. Example: f x 3x 3 2 x 2 x 7 . Find the value of this function for each of the following values. a) x=1 b) x=-2 f 1 31 21 1 7 3 2 1 7 5 3 2 f 2 3 2 2 2 2 7 3 8 24 2 7 24 8 2 7 41 3 2 Example: Evaluate each of the following functions for x=3. Round to two decimal places, if required. a) f x 2x 1 f 3 23 1 5 c) f x f 3 1 x2 1 32 1 1 1 Hw. P. 95-97 #1ade, 2ab, 3a,4b, 5ab, 6ef7ai,iv, 9bc,14 b) f x 2 x f 3 2 3 8 d) f x 4 Since this is a “constant” function, the value for f(x), or y, is ALWAYS 4. f 3 4