Math Problem Statement

what function matches this graph

What function matches this graph?

Solution

The graph you provided appears to be a rational function with vertical asymptotes and specific behavior near the origin. From its visual properties, we can describe a possible equation for the function based on its characteristics:

Key Observations:

  1. Vertical asymptotes at x=2x = -2 and x=2x = 2, which suggests that the function has factors like (x+2)(x + 2) and (x2)(x - 2) in the denominator.
  2. The graph also has a horizontal asymptote at y=0y = 0, indicating that as xx \to \infty, the function approaches 0.
  3. The graph seems to pass through specific points like (3,5)(-3, -5), (0,2)(0, 2), and (3,3)(3, 3), among others.
  4. The shape suggests that the function might be of the form f(x)=a(x2)(x+2)f(x) = \frac{a}{(x - 2)(x + 2)}, where aa is a constant to adjust the steepness.

Possible Function:

A reasonable guess for the function might be:

f(x)=a(x2)(x+2)f(x) = \frac{a}{(x - 2)(x + 2)}

Now, we need to determine the constant aa. Using a point from the graph, say at x=0x = 0, where y=2y = 2, we can substitute into the equation to find aa.

f(0)=a(02)(0+2)=2    a4=2    a=8f(0) = \frac{a}{(0 - 2)(0 + 2)} = 2 \implies \frac{a}{-4} = 2 \implies a = -8

Thus, the function could be:

f(x)=8(x2)(x+2)=8x24f(x) = \frac{-8}{(x - 2)(x + 2)} = \frac{-8}{x^2 - 4}

This function matches the general behavior of the graph.

Would you like more details or have any questions about this solution?


Related Questions:

  1. What is the general form of a rational function with vertical asymptotes?
  2. How do you find vertical asymptotes in a rational function?
  3. Can you explain why there is a horizontal asymptote at y=0y = 0?
  4. How can you determine the constant aa in rational functions based on graph points?
  5. What is the impact of changing aa in a function like f(x)=a(x2)(x+2)f(x) = \frac{a}{(x-2)(x+2)}?

Tip:

Always check the graph for asymptotes and intercepts to help identify key features of the function!

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Math Problem Analysis

Mathematical Concepts

Rational Functions
Asymptotes
Intercepts

Formulas

f(x) = a / [(x - 2)(x + 2)]
f(x) = -8 / (x^2 - 4)

Theorems

Vertical Asymptote Theorem
Horizontal Asymptote Theorem

Suitable Grade Level

Grades 10-12