Math Problem Statement

The graphs of y = (x - 3)^2 and y = (x - 3)^2 + 2 are shown on the diagram. Analyze the transformations of parabolas and sketch the graphs accordingly.

Solution

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Problem 8:

It discusses the transformations of parabolas and requires analysis of graphs and transformations.

  1. Part (a):

    • The graph of y=(x3)2+2y = (x - 3)^2 + 2 is a vertical shift of the graph y=(x3)2y = (x - 3)^2. It is shifted up by 2 units.
  2. Part (b):

    • The graph of y=(x3)22y = (x - 3)^2 - 2 is a vertical shift of y=(x3)2y = (x - 3)^2, but shifted down by 2 units.
  3. Part (c):

    • The graph of y=(x+3)2+2y = (x + 3)^2 + 2 represents a horizontal shift left by 3 units and a vertical shift up by 2 units compared to y=x2y = x^2.
  4. Part (d):

    • This part asks to explain the connection between the vertex form of a parabola y=a(xh)2+ky = a(x - h)^2 + k and its vertex (h,k)(h, k). The vertex is at the point (h,k)(h, k), and the transformations applied to the basic parabola y=x2y = x^2 can be directly observed in the values of hh and kk.
  5. Part (e):

    • The task is to sketch different parabolas based on transformations:
      1. y=(x2)2+3y = (x - 2)^2 + 3: Shift right by 2 units and up by 3 units.
      2. y=(x+2)2+3y = (x + 2)^2 + 3: Shift left by 2 units and up by 3 units.
      3. y=(x4)22y = (x - 4)^2 - 2: Shift right by 4 units and down by 2 units.
      4. y=(x+1)22y = (x + 1)^2 - 2: Shift left by 1 unit and down by 2 units.

Problem 9:

It requires sketching parabolas that have undergone transformations, especially involving reflection:

  • Part (a): y=(x+4)2y = (x + 4)^2: This is shifted left by 4 units.
  • Part (b): y=(x+4)2y = -(x + 4)^2: Shift left by 4 units, but the parabola is reflected over the x-axis.
  • Part (c): y=(x+4)2+3y = -(x + 4)^2 + 3: Shift left by 4 units, reflect over the x-axis, and shift up by 3 units.

Problem 10:

This focuses on finding equations of parabolas that result from transformations applied to y=x2y = x^2:

  • Part (a): Move up by 2 units: y=x2+2y = x^2 + 2.
  • Part (b): Move down by 2 units: y=x22y = x^2 - 2.
  • Part (c): Move 2 units to the right: y=(x2)2y = (x - 2)^2.
  • Part (d): Move 2 units to the left: y=(x+2)2y = (x + 2)^2.
  • Part (e): Turn it upside down and move it up by 4 units: y=x2+4y = -x^2 + 4.
  • Part (f): Turn it upside down and move it down by 2 units: y=x22y = -x^2 - 2.
  • Part (g): Move it up by 2 units and reflect in the x-axis: y=x2+2y = -x^2 + 2.
  • Part (h): Move it 2 units to the right and turn it upside down: y=(x2)2y = -(x - 2)^2.
  • Part (i): Turn it upside down and move it 3 units to the left and then down by 2 units: y=(x+3)22y = -(x + 3)^2 - 2.

Would you like further details or explanations on any of these transformations or solutions?

Here are 5 related questions to expand on this topic:

  1. What happens to a parabola's vertex if you apply both horizontal and vertical shifts?
  2. How does reflecting a parabola over the x-axis change its equation?
  3. How do we derive the vertex form of a parabola from its standard form?
  4. What impact does a horizontal shift have on the axis of symmetry of a parabola?
  5. Can we have transformations where both vertical and horizontal stretching/compression are involved? How does that affect the graph?

Tip: When transforming parabolas, always focus on the vertex form y=a(xh)2+ky = a(x - h)^2 + k to easily track shifts, stretches, and reflections.

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Functions
Graph Transformations
Vertex Form of Parabolas

Formulas

y = a(x - h)^2 + k (vertex form of a parabola)
y = (x - h)^2 (basic quadratic function)

Theorems

Parabola Shifts (Horizontal and Vertical)
Reflection over the x-axis
Vertex identification from quadratic equations

Suitable Grade Level

Grades 9-11