2 exercise which of the following functions are

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Unformatted text preview: re would the zeros of this function appear on the graph of y = f (x) ? exercise: Determine the zero(s) of the function g(x) = 2x + 9 QUADRATIC FUNCTIONS A quadratic function is a second degree function and can be written in its 2 • standard form: y = ax + bx + c, where a, b, and c are real numbers and a ≠ 0, or • vertex form: y = a(x − p) + q, where a, p, and q are real numbers and a ≠ 0. 2 exercise: Which of the following functions are quadratic? Explain why. a) y = x2 − 3x b ) y = 2x + 6 c) y = (x + 4)(2x − 1) d) y = (x + 7)2 + 5 e) y = (x + 2)(x − 2) Unit 1 – Day 2: Functions Review and Quadratic Functions Page 4 of 4 THE BASIC QUADRATIC FUNCTION AND ITS GRAPH The equation of the basic quadratic function is y = x2 or f (x) = x2. y Use a table of values to find ordered pairs for its graph. ± is “plus or minus” ; ±1 means “+1 or −1” 15 x 2 x =y (x,y) 0 10 ±1 ±2 ±3 5 ±4 Plot these points and sketch the rest of the graph. The graph is a curve called a parabola. Parts of a Parabola −5 0 5 x vertex = axis of symmetry equation of the axis of symmetry: minimum value of this function: maximum value for thi...
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