1. The problem is to match each quadratic equation to its corresponding graph.
2. The general form of a quadratic equation is $$y = ax^2 + bx + c$$ where $a$, $b$, and $c$ are constants.
3. Important rules:
- The coefficient $a$ determines the parabola's direction (up if $a>0$).
- The vertex's $x$-coordinate is given by $$x = -\frac{b}{2a}$$.
- The $y$-intercept is the constant term $c$.
4. Analyze each equation:
- For $$y = x^2 - 3$$:
- $a=1$, $b=0$, $c=-3$
- Vertex at $$x = -\frac{0}{2 \times 1} = 0$$
- Vertex point is $(0, -3)$
- Opens upward, shifted down by 3 units
- For $$y = x^2 + 3x - 6$$:
- $a=1$, $b=3$, $c=-6$
- Vertex at $$x = -\frac{3}{2 \times 1} = -\frac{3}{2} = -1.5$$
- Calculate vertex $y$:
$$y = (-1.5)^2 + 3(-1.5) - 6 = 2.25 - 4.5 - 6 = -8.25$$
- Vertex at $(-1.5, -8.25)$
- For $$y = x^2 + 4x + 5$$:
- $a=1$, $b=4$, $c=5$
- Vertex at $$x = -\frac{4}{2 \times 1} = -2$$
- Calculate vertex $y$:
$$y = (-2)^2 + 4(-2) + 5 = 4 - 8 + 5 = 1$$
- Vertex at $(-2, 1)$
5. Match to graphs:
- Left graph: $y = x^2 - 3$ (vertex at $(0,-3)$, opens upward)
- Middle graph: $y = x^2 + 3x - 6$ (vertex at $(-1.5,-8.25)$, opens upward)
- Right graph: $y = x^2 + 4x + 5$ (vertex at $(-2,1)$, opens upward)
Final answer:
- Left graph matches $$y = x^2 - 3$$
- Middle graph matches $$y = x^2 + 3x - 6$$
- Right graph matches $$y = x^2 + 4x + 5$$
Quadratic Graphs 296Bc3
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