Math Problem Statement

Sketch the graphs of the three functions by hand on the same rectangular coordinate system. Verify your results with a graphing utility.

Solution

The given problem requires sketching the graphs of three functions on the same coordinate plane and verifying with a graphing utility. The functions provided are:

  1. f(x)=(x3)2f(x) = (x - 3)^2
  2. g(x)=(x+3)2+3g(x) = (x + 3)^2 + 3
  3. h(x)=(x3)24h(x) = -(x - 3)^2 - 4

Let's break down each function:

1. f(x)=(x3)2f(x) = (x - 3)^2

This is a standard quadratic function in vertex form, shifted to the right by 3 units. The vertex is at (3,0)(3, 0), and since the coefficient of (x3)2(x - 3)^2 is positive, the parabola opens upwards.

2. g(x)=(x+3)2+3g(x) = (x + 3)^2 + 3

This is also a quadratic function in vertex form, shifted to the left by 3 units (due to x+3x + 3) and up by 3 units (because of the +3+3 outside the square). The vertex is at (3,3)(-3, 3), and the parabola opens upwards.

3. h(x)=(x3)24h(x) = -(x - 3)^2 - 4

This quadratic function is reflected over the x-axis (because of the negative sign in front of the square), and it is shifted 3 units to the right and 4 units downward. The vertex is at (3,4)(3, -4), and the parabola opens downward.

Summary of Transformations:

  • f(x)=(x3)2f(x) = (x - 3)^2: Shifted right 3 units, vertex at (3,0)(3, 0), opens upwards.
  • g(x)=(x+3)2+3g(x) = (x + 3)^2 + 3: Shifted left 3 units and up 3 units, vertex at (3,3)(-3, 3), opens upwards.
  • h(x)=(x3)24h(x) = -(x - 3)^2 - 4: Shifted right 3 units and down 4 units, vertex at (3,4)(3, -4), opens downwards.

Sketching:

  1. For f(x)f(x), plot the vertex at (3,0)(3, 0) and sketch an upward-opening parabola.
  2. For g(x)g(x), plot the vertex at (3,3)(-3, 3) and sketch another upward-opening parabola.
  3. For h(x)h(x), plot the vertex at (3,4)(3, -4) and sketch a downward-opening parabola.

Would you like me to generate the graphs or explain the next steps in more detail?

Related Questions:

  1. How do you find the vertex of a quadratic function in vertex form?
  2. What effect does the sign of the leading coefficient have on the direction of a parabola?
  3. How do horizontal and vertical shifts affect the graph of a quadratic function?
  4. Can the vertex of a quadratic function be used to solve maximum or minimum problems?
  5. How do reflections over the x-axis affect the shape of a parabola?

Tip:

When sketching quadratic functions, always identify the vertex and axis of symmetry first, as they give the key points to guide the sketch.

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Math Problem Analysis

Mathematical Concepts

Graphing Quadratic Functions
Vertex Form
Transformations of Quadratic Functions

Formulas

Vertex Form of a Quadratic Function: y = a(x - h)^2 + k

Theorems

Transformations of Functions: Horizontal Shift, Vertical Shift, Reflection

Suitable Grade Level

Grades 9-12