Question
Fall 2024 The graph of a quadratic function is given.Determine the function's equation. 1)
Solution
4.6
(260 Votos)
Daniela
Elite · Tutor por 8 anos
Resposta
To determine the equation of a quadratic function from its graph, we need to identify key features such as the vertex, axis of symmetry, and any points through which the graph passes. The general form of a quadratic function is:
Alternatively, if we know the vertex \((h, k)\), we can use the vertex form:
Let's go through the steps to find the equation:1. **Identify the Vertex**: The vertex form of a quadratic function is useful if we know the vertex. Suppose the vertex is at \((h, k)\).2. **Determine the Value of
**: To find
, we need another point on the graph. Let's say the graph passes through the point \((x_1, y_1)\).3. **Substitute the Values**: Substitute the vertex and the point into the vertex form to solve for
.4. **Write the Equation**: Once
is determined, write the full equation in vertex form or convert it to standard form if needed.### ExampleSuppose the graph has a vertex at \((2, 3)\) and passes through the point \((4, 7)\).1. **Vertex Form**: Start with the vertex form of the quadratic equation:
2. **Substitute the Point (4, 7)**:
3. **Solve for
**:
4. **Write the Equation**:
If you prefer the standard form, expand the vertex form:
Thus, the equation of the quadratic function is:
If you provide specific details about the graph, such as the vertex and another point, I can give you a more precise equation.