Math Problem Statement

A function f(x) includes the points (2, 3) , (−5, 1) , and (10, −3) in its graph. Based on this, which of the following points must be included in the graph of f−1(x) ?

Choose TWO correct answers. A.(3, 4)

B.(−3, 10)

C.(−1, 5)

D.(−3, −2)

E.(−5, 1)

F.(3, 2)

Solution

For a function f(x)f(x) and its inverse f1(x)f^{-1}(x), the points on the graph of ff and f1f^{-1} are related in a very specific way. If f(a)=bf(a) = b, then f1(b)=af^{-1}(b) = a. Essentially, the xx- and yy-coordinates of each point on the graph of ff are swapped for the corresponding point on the graph of f1f^{-1}.

Given that f(x)f(x) includes the points (2,3)(2, 3), (5,1)(-5, 1), and (10,3)(10, -3), their corresponding points on f1(x)f^{-1}(x) will be:

  • (2,3)(2, 3) on f(x)f(x) becomes (3,2)(3, 2) on f1(x)f^{-1}(x).
  • (5,1)(-5, 1) on f(x)f(x) becomes (1,5)(1, -5) on f1(x)f^{-1}(x).
  • (10,3)(10, -3) on f(x)f(x) becomes (3,10)(-3, 10) on f1(x)f^{-1}(x).

Thus, the correct points that must be included in the graph of f1(x)f^{-1}(x) are:

  • B. (-3, 10)
  • F. (3, 2)

Would you like further clarification or details?


Here are 5 related questions to further explore this concept:

  1. How do you find the inverse of a function algebraically?
  2. Can every function have an inverse? Why or why not?
  3. What conditions must a function meet for its inverse to also be a function?
  4. What are the graphical properties of a function and its inverse?
  5. How do domain and range relate between a function and its inverse?

Tip: A function must be bijective (both injective and surjective) to have an inverse that is also a function.

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Math Problem Analysis

Mathematical Concepts

Inverse Functions
Function Graphs
Coordinate Geometry

Formulas

If f(a) = b, then f−1(b) = a

Theorems

Inverse Function Theorem
Property of Inverse Functions (Swapping Coordinates)

Suitable Grade Level

Grades 10-12