Math Problem Statement

Analyze the graph and quadratic equation to determine the vertex of each function and compare their maximum values.

Solution

Let's analyze the information from the image and solve the questions step by step.

  1. Equation Provided (Function 2): f(x)=3x212x8f(x) = -3x^2 - 12x - 8 This is a quadratic function, and the general form of a quadratic equation is: f(x)=ax2+bx+cf(x) = ax^2 + bx + c In this case:

    • a=3a = -3
    • b=12b = -12
    • c=8c = -8
  2. Finding the vertex of Function 2: The vertex (h,k)(h, k) of a quadratic function can be found using the formula: h=b2a,k=f(h)h = \frac{-b}{2a}, \quad k = f(h) Let's calculate the vertex of this function.

    h=(12)2(3)=126=2h = \frac{-(-12)}{2(-3)} = \frac{12}{-6} = -2 Now, substitute h=2h = -2 into the equation to find kk: k=3(2)212(2)8=3(4)+248=12+248=4k = -3(-2)^2 - 12(-2) - 8 = -3(4) + 24 - 8 = -12 + 24 - 8 = 4 Therefore, the vertex of Function 2 is (2,4)(-2, 4).


Next, let's analyze Function 1 by interpreting the graph provided.

  1. Vertex of Function 1: From the graph of Function 1, it appears that the vertex is at the point (1,5)(1, 5). This can be determined visually as the highest point on the parabola.

Now, let's answer the specific questions from the image:

(a) What is the vertex of Function 1?

The vertex of Function 1 is (1,5)(1, 5).

(b) What is the vertex of Function 2?

The vertex of Function 2 is (2,4)(-2, 4).

(c) Which function has the larger maximum value?

The maximum value is given by the yy-coordinate of the vertex for both functions:

  • Maximum value of Function 1: 5
  • Maximum value of Function 2: 4

Therefore, Function 1 has the larger maximum value.


Would you like more details on any of these steps, or explanations on specific concepts?

Here are some follow-up questions you might find helpful:

  1. How is the vertex form of a quadratic function derived from its standard form?
  2. Can you explain how the sign of aa (the coefficient of x2x^2) affects the shape of the parabola?
  3. What are the steps to convert a quadratic function from standard form to vertex form?
  4. How do you find the axis of symmetry of a parabola?
  5. How can the discriminant of a quadratic equation help determine the nature of its graph?

Tip: Always double-check your calculations when finding the vertex, as small errors in substitution can lead to incorrect results!

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Math Problem Analysis

Mathematical Concepts

Quadratic Equations
Vertex of a Parabola
Maximum Value of Functions

Formulas

Quadratic function: f(x) = ax^2 + bx + c
Vertex formula: h = -b / (2a), k = f(h)

Theorems

The vertex of a parabola represents its maximum or minimum point depending on the sign of 'a'.
If 'a' < 0, the parabola opens downward and the vertex represents the maximum value.

Suitable Grade Level

Grades 8-10