Вопрос:
Match the graphs to the equations.
Смотреть решения всех заданий с листаОтвет:
For question 5:
- Graph A matches equation 3: $$y = -x^2 + 7x - 9$$. The parabola opens downwards, and the vertex is approximately at (3.5, 3.25).
- Graph Б matches equation 1: $$y = x^2 - 7x + 9$$. The parabola opens upwards, and the vertex is approximately at (3.5, -3.25).
- Graph B matches equation 2: $$y = -x^2 - 7x - 9$$. The parabola opens downwards, and the vertex is approximately at (-3.5, -0.25).
For question 6:
- Graph A matches equation 3: $$y = -3x^2 - 24x - 42$$. The parabola opens downwards, and the vertex is approximately at (-4, 6).
- Graph Б matches equation 1: $$y = -3x^2 + 24x - 42$$. The parabola opens downwards, and the vertex is approximately at (4, 6).
- Graph B matches equation 2: $$y = 3x^2 - 24x + 42$$. The parabola opens upwards, and the vertex is approximately at (4, -6).
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