1) Which of the following quadratic functions opens upward? a) y = 2x² - 7x + 4 b) y = -2x² - 7x + 4 c) y = -x² -x +5 2) Which of the following quadratic functions opens downward? a) y = -3x² + 2x+5 b) y = x² + 4x+4 c) y = 2x² + 8x+9 3) Which of the following quadratic functions opens upward? a) y =-1/3 (x+5)²+9 b) y = -(x+6)²+8 c) y =4/9 (x+2)²+4 4) Which of the following quadratic functions opens upward? a) y = -(x - 1)² + 6 b) y = (x - 2)² + 4 c) y = -(x - 8)² + 8 5) Which of the following quadratic functions opens downward? a) y = 2 + 3x - 5x² b) y = 2 + 3x + x² c) y = 8 + 6x + x²

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