Math Problem Statement

Comparing graphs and identifying parent functions for different equations and transformations

Solution

Let's go through the problems in this image:

Problems 1-4: Comparing Graphs of Two Functions

  1. f(x)=xf(x) = x, g(x)=2x+3g(x) = -2x + 3

    • g(x)g(x) is a linear function as well, but it is a reflection of f(x)f(x) across the x-axis (due to the negative sign) and a vertical stretch by a factor of 2. Additionally, it's shifted upward by 3 units.
  2. f(x)=xf(x) = |x|, g(x)=12x+3g(x) = -\frac{1}{2}|x| + 3

    • g(x)g(x) involves a vertical compression of f(x)f(x) by a factor of 12\frac{1}{2} and reflection across the x-axis. Then, it's shifted up by 3 units.
  3. f(x)=x2f(x) = x^2, g(x)=3(x+4)21g(x) = 3(x + 4)^2 - 1

    • The graph of g(x)g(x) is the graph of f(x)=x2f(x) = x^2 shifted to the left by 4 units (due to +4+4), vertically stretched by a factor of 3, and shifted downward by 1 unit.
  4. f(x)=3xf(x) = 3x, g(x)=34(x2)g(x) = \frac{3}{4}(x - 2)

    • g(x)g(x) involves a horizontal shift to the right by 2 units and a vertical compression by a factor of 34\frac{3}{4}.

Problems 5-8: Identifying Parent Function, Values of aa, hh, kk and Graphing

For each of the following functions, we'll identify the parent function and values of aa, hh, and kk, and describe the transformations.

  1. y=x23y = x^2 - 3

    • Parent function: y=x2y = x^2
    • a=1a = 1 (no vertical stretch/compression)
    • h=0h = 0 (no horizontal shift)
    • k=3k = -3 (shifted down by 3 units)
  2. y=3x+2+4y = -3|x + 2| + 4

    • Parent function: y=xy = |x|
    • a=3a = -3 (vertical stretch by 3 and reflection across x-axis)
    • h=2h = -2 (shifted to the left by 2 units)
    • k=4k = 4 (shifted up by 4 units)
  3. y=23(x1)+2y = \frac{2}{3}(x - 1) + 2

    • Parent function: y=xy = x (linear)
    • a=23a = \frac{2}{3} (vertical compression by 23\frac{2}{3})
    • h=1h = 1 (shifted to the right by 1 unit)
    • k=2k = 2 (shifted up by 2 units)
  4. y=(3x)21y = -(3 - x)^2 - 1

    • Parent function: y=x2y = x^2
    • a=1a = -1 (reflection across x-axis, no vertical stretch/compression)
    • h=3h = 3 (shifted to the right by 3 units)
    • k=1k = -1 (shifted down by 1 unit)

If you need detailed graphing or further explanation, feel free to ask!

Here are some related questions to explore:

  1. How do vertical shifts affect the graph of a function?
  2. What is the effect of multiplying a function by a negative number?
  3. How can horizontal shifts be identified in function transformations?
  4. How do you determine whether a function is stretched or compressed?
  5. What is the geometric meaning of reflecting a function across the x-axis?

Tip:

Always pay close attention to the signs of hh and kk when determining shifts in a function's graph.

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Math Problem Analysis

Mathematical Concepts

Linear functions
Absolute value functions
Quadratic functions
Transformations (reflection, shift, stretch, compression)

Formulas

y = mx + b (Linear equation)
y = |x| (Absolute value)
y = ax^2 + bx + c (Quadratic equation)

Theorems

Properties of transformations
Vertical and horizontal shifts
Reflection across axes
Vertical stretch and compression

Suitable Grade Level

Grades 9-12