Math Problem Statement

Evaluate g(f(-7)) using the graphs of f(x) and g(x).

Solution

To evaluate g(f(7))g(f(-7)), we need to follow these steps:

  1. Find f(7)f(-7) from the graph of f(x)f(x) (on the left).
  2. Use the value of f(7)f(-7) to find g(f(7))=g(value)g(f(-7)) = g(\text{value}) using the graph of g(x)g(x) (on the right).

Step 1: Find f(7)f(-7)

  • From the graph of f(x)f(x) on the left, locate x=7x = -7.
  • The corresponding yy-value at x=7x = -7 is f(7)=9f(-7) = 9.

Step 2: Find g(f(7))=g(9)g(f(-7)) = g(9)

  • Now, go to the graph of g(x)g(x) (on the right) and locate x=9x = 9.
  • The corresponding yy-value at x=9x = 9 is g(9)=7g(9) = 7.

Final Answer:

Therefore, g(f(7))=7g(f(-7)) = 7.

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

Here are 5 related questions to expand your understanding:

  1. What does it mean when we perform a composition of functions like g(f(x))g(f(x))?
  2. How do you determine the range of f(x)f(x) and g(x)g(x) from their graphs?
  3. What are other ways to solve composite functions besides using graphs?
  4. How can you determine whether f(x)f(x) or g(x)g(x) is one-to-one or onto by observing the graph?
  5. How does the behavior of the graphs affect the values of composite functions?

Tip: When working with composite functions, always evaluate the inner function first before moving on to the outer function.

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Math Problem Analysis

Mathematical Concepts

Function Composition
Graph Interpretation
Algebra

Formulas

g(f(x)) = g( f(-7) )
Evaluate using the graphs

Theorems

Function Composition Theorem

Suitable Grade Level

Grades 9-12