Math Problem Statement

Write down the coordinates of the turning point of the curve with equation: a) y = f(x + 2), b) y = f(x - 2), c) y = f(x) + 2, d) y = f(x) - 2, e) y = -f(x), f) y = -f(x) + 2.

Solution

The diagram shows the curve y=f(x)y = f(x), with its minimum point at (2,1)(2, -1). You are asked to find the turning points (minimum or maximum) of new functions derived from transformations of f(x)f(x).

To solve this:

1. Transformation rules:

  • y=f(x+a)y = f(x + a): This translates the graph horizontally by a-a. Positive aa shifts the graph left by aa units, and negative aa shifts it right.
  • y=f(x)+ay = f(x) + a: This translates the graph vertically by aa. Positive aa shifts it up, and negative aa shifts it down.
  • y=f(x)y = -f(x): Reflects the graph vertically (about the x-axis).
  • y=f(x)y = f(-x): Reflects the graph horizontally (about the y-axis).

The minimum point of the original curve is (2,1)(2, -1). Let's apply these transformations one by one.

Answers:

a) y=f(x+2)y = f(x + 2):

  • Horizontal shift left by 2. The new minimum point is at (0,1)(0, -1).

b) y=f(x2)y = f(x - 2):

  • Horizontal shift right by 2. The new minimum point is at (4,1)(4, -1).

c) y=f(x)+2y = f(x) + 2:

  • Vertical shift up by 2. The new minimum point is at (2,1)(2, 1).

d) y=f(x)2y = f(x) - 2:

  • Vertical shift down by 2. The new minimum point is at (2,3)(2, -3).

e) y=f(x)y = -f(x):

  • Reflection in the x-axis. The new point is a maximum at (2,1)(2, 1).

f) y=f(x)+2y = -f(x) + 2:

  • Reflection in the x-axis and shift up by 2. The new point is a maximum at (2,3)(2, 3).

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

Here are 5 related questions:

  1. How does the transformation y=f(x+a)y = f(x + a) affect the curve's behavior?
  2. What is the result of reflecting a curve around the x-axis?
  3. Can a curve have more than one turning point?
  4. How do vertical shifts affect the curvature of the graph?
  5. What happens when both horizontal and vertical transformations are applied simultaneously?

Tip: Always remember that horizontal shifts affect the x-coordinate, while vertical shifts impact the y-coordinate.

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Math Problem Analysis

Mathematical Concepts

Function Transformations
Coordinate Geometry

Formulas

Horizontal shift: y = f(x + a) shifts a units left if a > 0
Vertical shift: y = f(x) + a shifts a units up if a > 0
Reflection: y = -f(x) reflects the graph across the x-axis
Reflection: y = f(-x) reflects the graph across the y-axis

Theorems

Function Transformation Theorems

Suitable Grade Level

High School