Math Problem Statement

answer with step by step solutions

Find the coordinates of the point to which P(3, -2) is mapped when the curve with equation y = f(x) is transformed to the curve with equations y = f(x - 2), y = f(2x), and y = 3f(-x) + 5.

Solution

Problem Breakdown:

We are tasked with finding the coordinates of the point P(3,2)P(3, -2) after applying three different transformations to the function y=f(x)y = f(x).


Part (i): y=f(x2)y = f(x - 2)

  • Transformation type: Horizontal translation.
  • Effect: Shifts the graph 2 units to the right.
  • New xx-coordinate: Add 2 to xx.
    xnew=3+2=5x_{\text{new}} = 3 + 2 = 5
  • yy-coordinate remains unchanged: ynew=2y_{\text{new}} = -2.
  • Transformed coordinates: (5,2)(5, -2).

Part (ii): y=f(2x)y = f(2x)

  • Transformation type: Horizontal compression by a factor of 12\frac{1}{2}.
  • Effect: Divide xx-coordinate by 2.
    xnew=32=1.5x_{\text{new}} = \frac{3}{2} = 1.5
  • yy-coordinate remains unchanged: ynew=2y_{\text{new}} = -2.
  • Transformed coordinates: (1.5,2)(1.5, -2).

Part (iii): y=3f(x)+5y = 3f(-x) + 5

  • Step 1: Reflection in the yy-axis.
    • Change the sign of xx:
      xnew=3x_{\text{new}} = -3
  • Step 2: Vertical scaling by 3.
    • Multiply the yy-coordinate by 3:
      yscaled=3×(2)=6y_{\text{scaled}} = 3 \times (-2) = -6
  • Step 3: Vertical translation upward by 5.
    • Add 5 to the scaled yy-coordinate:
      ynew=6+5=1y_{\text{new}} = -6 + 5 = -1
  • Transformed coordinates: (3,1)(-3, -1).

Final Answers:

  1. (5,2)(5, -2)
  2. (1.5,2)(1.5, -2)
  3. (3,1)(-3, -1)

Let me know if you'd like a detailed explanation of transformations or have further questions! 😊

Follow-up Questions:

  1. How do horizontal translations affect xx-coordinates in general?
  2. Why does a horizontal compression involve dividing the xx-coordinate?
  3. What is the significance of reflections in xx- or yy-axes for transformations?
  4. How does vertical scaling influence the yy-coordinate?
  5. Can you combine multiple transformations into one equation?

Tip: Always apply transformations in the correct order and carefully consider the sign changes for reflections.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Function Transformations
Coordinate Geometry

Formulas

Horizontal translation: x_new = x + c
Horizontal compression: x_new = x / k
Reflection and scaling: y_new = a*f(-x) + b

Theorems

Transformation of Functions Theorem

Suitable Grade Level

Grades 11-12 (A-Level Mathematics)