a. Find the coordinates of the vertex of the parabola y = ax2 + bx + c, a ≠ 0. b. When is the parabola concave up? Concave down? Give reasons for your answers.

Elementary Algebra
17th Edition
ISBN:9780998625713
Author:Lynn Marecek, MaryAnne Anthony-Smith
Publisher:Lynn Marecek, MaryAnne Anthony-Smith
Chapter10: Quadratic Equations
Section10.5: Graphing Quadratic Equations
Problem 10.87TI: Determine whether each parabola opens upward or downward: (a) y=2x2+5x2 (b) y=3x24x+7
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a. Find the coordinates of the vertex of the parabola y = ax2 + bx + c, a ≠ 0. b. When is the parabola concave up? Concave down? Give reasons for your answers.

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