Math Problem Statement

Use transformations to construct a function whose graph is as shown in the figure with y = sqrt(8x - x^2).

Solution

The problem in the image asks for the construction of a function using transformations, based on the graph provided.

Let's break it down:

Given Equation:

The first equation is y=8xx2y = \sqrt{8x - x^2}, which is a semicircle centered along the x-axis with a radius of 4. The domain for this function is 0x80 \leq x \leq 8.

Transformation Requirement:

The goal is to construct a similar graph using a transformation.

Incorrect Attempt:

The equation provided in the second part, y=8x2x2y = \sqrt{8x - 2x^2}, has been marked incorrect, likely because it does not produce the desired transformation.

Finding the Correct Transformation:

One possible transformation of the function would involve scaling or shifting. Let's attempt to modify the original function:

Transformation Idea:

A vertical stretch could involve scaling the y-values of the original graph. Since the first graph has a maximum y-value of 4, and the second graph has a maximum y-value of 8, it seems that the y-values have been scaled by a factor of 2.

Therefore, the correct transformation could be to multiply the original equation's output by 2.

This gives: y=28xx2y = 2\sqrt{8x - x^2}

This equation would stretch the y-values of the original semicircle, doubling the maximum value, thus matching the second graph.

Would you like further details or have any specific questions?


Here are 5 questions to consider next:

  1. How does scaling affect the graph of a function?
  2. What are the rules for applying vertical and horizontal stretches to a function?
  3. How can you identify whether a transformation is vertical or horizontal?
  4. Can transformations be combined, and how do they interact?
  5. How can domain and range change when a function is transformed?

Tip: When transforming functions, always check the maximum and minimum values to ensure the transformation is applied correctly.

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Math Problem Analysis

Mathematical Concepts

Function Transformation
Algebra

Formulas

y = sqrt(8x - x^2)

Theorems

Transformation of Functions

Suitable Grade Level

Grades 10-12