Math Problem Statement

Write a quadratic function in the vertex form f(x) = a(x − h)^2 + k such that the graph of the function opens up and has a vertex at (−5,1) and contains the point (−2,10).

Solution

We are given the vertex form of a quadratic function: f(x)=a(xh)2+kf(x) = a(x - h)^2 + k The vertex of the function is at (5,1)(-5, 1), which gives us h=5h = -5 and k=1k = 1. Therefore, the function so far looks like this: f(x)=a(x+5)2+1f(x) = a(x + 5)^2 + 1

Next, we are given that the quadratic function passes through the point (2,10)(-2, 10). To find the value of aa, substitute x=2x = -2 and f(x)=10f(x) = 10 into the equation: 10=a(2+5)2+110 = a(-2 + 5)^2 + 1 10=a(3)2+110 = a(3)^2 + 1 10=9a+110 = 9a + 1 Now, solve for aa: 9a=9    a=19a = 9 \implies a = 1

Thus, the quadratic function is: f(x)=(x+5)2+1f(x) = (x + 5)^2 + 1

Would you like more details or have any further questions?

Here are 5 related questions you might find useful:

  1. How do you convert a quadratic equation from vertex form to standard form?
  2. What is the significance of the value aa in the vertex form of a quadratic equation?
  3. How do you find the vertex of a quadratic function given its standard form?
  4. How do you determine whether a quadratic function opens upward or downward?
  5. Can a quadratic function have more than one vertex?

Tip: In the vertex form of a quadratic function, the value of hh represents the x-coordinate of the vertex, and kk represents the y-coordinate.

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Functions
Vertex Form

Formulas

Vertex form of quadratic function: f(x) = a(x − h)^2 + k
Substituting point into the quadratic function to solve for a

Theorems

Vertex form of quadratic equations
Solving for constants using known points

Suitable Grade Level

Grades 9-11