Math Problem Statement

State the parent function. Graph the parent function. Lastly, graph the transformed function and state transformed function and state the transformations. F(x)=-2(x+1)^2+1

Solution

Let's break this down step by step:

1. Identify the Parent Function:

The given function is F(x)=2(x+1)2+1F(x) = -2(x+1)^2 + 1.

The parent function is the simplest form of a function type without any transformations. In this case, the parent function is:

f(x)=x2f(x) = x^2

This is the basic quadratic function (a parabola), which opens upwards and has its vertex at (0,0)(0,0).

2. Graph the Parent Function:

The graph of the parent function f(x)=x2f(x) = x^2 is a parabola with the following properties:

  • Vertex: (0,0)(0,0)
  • Axis of symmetry: x=0x = 0 (the y-axis)
  • Opens upwards
  • Symmetrical

3. Transformed Function and its Graph:

Now, let's analyze the transformed function F(x)=2(x+1)2+1F(x) = -2(x+1)^2 + 1.

Steps to describe the transformations:

  1. Horizontal Shift: The term (x+1)2(x + 1)^2 means the graph is shifted 1 unit to the left (opposite of the sign inside the parentheses).

  2. Vertical Stretch and Reflection: The coefficient 2-2 causes two changes:

    • The negative sign indicates a reflection across the x-axis (the parabola flips upside down).
    • The 2 indicates a vertical stretch by a factor of 2, making the parabola narrower.
  3. Vertical Shift: The +1+1 at the end means the graph is shifted 1 unit up.

Final Transformed Function:

F(x)=2(x+1)2+1F(x) = -2(x+1)^2 + 1

Graph Properties:

  • Vertex: (1,1)(-1, 1)
  • Axis of Symmetry: x=1x = -1
  • Direction: Opens downwards (due to the reflection)
  • Narrower Parabola: Because of the vertical stretch by a factor of 2

Summary of Transformations:

  • Shift left by 1 unit
  • Shift up by 1 unit
  • Reflect across the x-axis
  • Vertically stretch by a factor of 2

Graphing:

I can describe how the graph would look, but I could also generate a visual if you'd like. Would you prefer I generate the graph for the parent function and the transformed function?


Do you have any questions or would you like further details? Here are 5 questions to consider:

  1. How does a reflection across the x-axis affect the graph of a function?
  2. How do you find the vertex of a transformed quadratic function?
  3. What effect does a vertical stretch have on a parabola's width?
  4. What is the axis of symmetry in a quadratic function and how is it affected by transformations?
  5. How would additional transformations (e.g., horizontal stretch) impact the function?

Tip: Always remember to identify the vertex first when analyzing quadratic functions—it can give you key insights into transformations.

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Math Problem Analysis

Mathematical Concepts

Quadratic Functions
Function Transformations
Parabolas

Formulas

f(x) = a(x-h)^2 + k
Parent function: f(x) = x^2

Theorems

Vertex form of a quadratic function
Transformations of functions

Suitable Grade Level

Grades 9-11