Subjects algebra

Quadratic Vertex D2628F

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Question: Consider the quadratic function $y = -x^2 + 6x - 5$. What do we know about the graph of this quadratic equation, based on its formula? The vertex is (3,-32) and it opens upward. The vertex is (3,4) and it opens downward. The vertex is (3,-32) and it opens downward. The vertex is (3,4) and it opens upward.
1. **State the problem:** We are given the quadratic function $$y = -x^2 + 6x - 5$$ and need to determine the vertex and the direction the parabola opens. 2. **Recall the vertex formula:** For a quadratic function $$y = ax^2 + bx + c$$, the vertex $$x$$-coordinate is given by $$x = -\frac{b}{2a}$$. 3. **Identify coefficients:** Here, $$a = -1$$, $$b = 6$$, and $$c = -5$$. 4. **Calculate the vertex $$x$$-coordinate:** $$x = -\frac{6}{2 \times -1} = -\frac{6}{-2} = 3$$ 5. **Calculate the vertex $$y$$-coordinate:** Substitute $$x=3$$ into the function: $$y = -(3)^2 + 6(3) - 5 = -9 + 18 - 5 = 4$$ 6. **Determine the direction the parabola opens:** Since $$a = -1 < 0$$, the parabola opens downward. 7. **Conclusion:** The vertex is $$(3,4)$$ and the parabola opens downward. **Final answer:** The vertex is $$(3,4)$$ and it opens downward.