Math Problem Statement

Use the graph of the parabola to find the table details, including the direction it opens, axis of symmetry, intercepts, and the vertex.

Solution

Let's analyze the provided graph of the parabola and answer each part step by step:


(a) Does the parabola open upward or downward?

  • The parabola opens upward because its arms are facing upwards.

(b) Find the equation of the axis of symmetry.

  • The axis of symmetry is a vertical line that passes through the vertex of the parabola.
  • From the graph, the vertex appears to be located at x=2x = -2.
  • Thus, the equation of the axis of symmetry is:
    x=2x = -2

(c) Find the intercept(s).

  1. X-intercept(s):

    • The parabola crosses the x-axis at two points. By checking the graph, the x-intercepts are at x=4x = -4 and x=0x = 0.
    • So, the x-intercepts are:
      4,0-4, 0
  2. Y-intercept(s):

    • The y-intercept is the point where the parabola crosses the y-axis.
    • From the graph, the parabola crosses the y-axis at y=4y = 4.
    • So, the y-intercept is:
      44

(d) Find the coordinates of the vertex.

  • From the graph, the vertex is the minimum point of the parabola. It is located at:
    (2,4)(-2, 4)

Final Answers:

  • (a) Upward
  • (b) Equation of axis of symmetry: x=2x = -2
  • (c) X-intercepts: -4, 0
    Y-intercept: 4
  • (d) Vertex: (2,4)(-2, 4)

Let me know if you would like a detailed explanation for any part!

Related Questions:

  1. How do you determine the axis of symmetry from a quadratic equation?
  2. What is the general formula for finding the vertex of a parabola?
  3. Can a parabola have no x-intercepts? Explain why.
  4. What does the y-coordinate of the vertex represent in a parabola?
  5. How do you determine if a parabola opens upward or downward from its equation?

Tip:

The vertex form of a quadratic equation, y=a(xh)2+ky = a(x - h)^2 + k, makes it easy to identify the vertex (h,k)(h, k).

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Math Problem Analysis

Mathematical Concepts

Quadratic Equations
Parabolas
Axis of Symmetry
Intercepts
Vertex of a Parabola

Formulas

Equation of axis of symmetry: x = h (where h is the x-coordinate of the vertex)
X-intercept(s): Solve y = 0 in the quadratic equation
Y-intercept: Set x = 0 in the quadratic equation
Vertex: The minimum/maximum point of the parabola (h, k)

Theorems

Symmetry of Parabolas
Properties of Quadratic Equations

Suitable Grade Level

Grades 8-10