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November 15, 2012 Function notation

November 15, 2012 Function notation. Warm-up: Is the relation {(3, 4), (-1, 2), (2, 4), (-2, 5) a function? Determine the domain and range of the relation. 3. What is the inverse of the relation?. HW 4.6: Functions WS F block Partner Quiz Friday A block Partner Quiz Monday. y. y. 5.

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November 15, 2012 Function notation

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  1. November 15, 2012Function notation Warm-up: Is the relation {(3, 4), (-1, 2), (2, 4), (-2, 5) a function? Determine the domain and range of the relation. 3. What is the inverse of the relation? HW 4.6: Functions WS F block Partner Quiz Friday A block Partner Quiz Monday

  2. y y 5 5 x x -5 -5 5 5 -5 -5 Lesson 4.6: FunctionsAnother way to determine whether a relation is a function is the Vertical Line Test. The Vertical Line Test - If a vertical line touches the graph only once, then it is a function . Ex 1. Ex 2.

  3. y 5 x -5 5 -5 Practice – Determine whether the relation is a function. 1. 2.

  4. Function Notation – another way to evaluate an expression.f(x) “f of x” The f is just the name of the function. It is not a variable that is multiplied by x. Example 3: If f(x) = 2x – 1, find f(4) Substitute x = 4, then simplify.

  5. PracticeIf f(x) = -2x + 5 and g(x) = x2 – 8, find each value. • f(-4) 2. f(8) 3. g(8) 4. g(-5) 5. f(x + 3) 6. g(2) + 3

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