Math Problem Statement

Solution

To determine which graph corresponds to the quadratic function y=x2+10x+16y = x^2 + 10x + 16, we need to analyze the function's properties.

First, we find the vertex of the parabola. The vertex form of a quadratic function y=ax2+bx+cy = ax^2 + bx + c has its vertex at (h,k)(h, k) where h=b2ah = -\frac{b}{2a}.

For y=x2+10x+16y = x^2 + 10x + 16:

a=1,b=10a = 1, \quad b = 10

So,

h=1021=5h = -\frac{10}{2 \cdot 1} = -5

Next, we calculate the y-coordinate of the vertex by substituting x=5x = -5 back into the function:

k=(5)2+10(5)+16=2550+16=9k = (-5)^2 + 10(-5) + 16 = 25 - 50 + 16 = -9

Thus, the vertex of the parabola is (5,9)(-5, -9).

Next, we check the y-intercept of the function, which is the constant term c=16c = 16. This means the graph will cross the y-axis at y=16y = 16.

Now, we analyze the given graphs:

  • Graph A: Vertex is not at (5,9)(-5, -9).
  • Graph B: Vertex is at (5,9)(-5, -9) and the y-intercept is 1616.
  • Graph C: Vertex is not at (5,9)(-5, -9).
  • Graph D: Vertex is not at (5,9)(-5, -9).

Graph B is the only graph that correctly shows the vertex at (5,9)(-5, -9) and the y-intercept at 1616.

Therefore, the answer is:

B. Graph B\boxed{\text{B. Graph B}}

Do you want details or have any questions? Here are five more questions you might ask:

  1. How do you determine the vertex of a quadratic function?
  2. What are the key features to look for when graphing a quadratic function?
  3. How do you find the axis of symmetry of a parabola?
  4. How can you find the roots of a quadratic function using the quadratic formula?
  5. What is the significance of the discriminant in a quadratic equation?

Tip: When analyzing the graph of a quadratic function, always identify the vertex and y-intercept to confirm its correct placement on the coordinate plane.

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Math Problem Analysis

Mathematical Concepts

Quadratic Functions
Vertex Form
Coordinate Geometry

Formulas

Vertex form of a quadratic function: y = ax^2 + bx + c, where the vertex is at (h, k) and h = -b / (2a)

Theorems

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Suitable Grade Level

High School