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UNIT ONE: Lesson Two: Function Notation When using function notation, f x is used to replace y in the equation of the function. i.e. y 2x 3 and f x 2 x 3 mean the same thing. f x is read “f at x” or “f of x”, which means the function evaluated at x. So, f 5 would mean “evaluate the function when x=5” or “find the y value when x=5.” Note: f x is commonly used, but you may see g x, hx, k x, etc... These all mean the same thing. Examples: 1. Given f x 3x 2 . Find…. a) f 1 b) f 6 c) f 2 x d) f x 1 2. Consider the function g(x) below. Find a) g(-1) b) g(1) c) g(3) –g(1) d) g(3-1) 3. Copy the points on the grid from the smart board. Let the points be represented by f(x). Find a) f(2) b) 2f(1)-3 4. Given f x x 2 2 x 1, find f 3 f 0 f 1 f 2 .