Math Problem Statement

Write an equation for the function graphed below. The y-intercept is at (0, -0.3).

Solution

To determine an equation for the function graphed, let's analyze the characteristics of the graph provided:

  1. Vertical Asymptotes: There are vertical asymptotes at x=2x = -2 and x=3x = 3, as indicated by the red dashed lines. This suggests that the function has factors in the denominator that cause division by zero at these points, possibly of the form 1(x+2)(x3)\frac{1}{(x + 2)(x - 3)}.

  2. Y-intercept: The y-intercept is given as (0,0.3)(0, -0.3). This information will help us determine any constants or multipliers in the function.

  3. General Shape of the Graph:

    • The function behaves as a rational function with asymptotes and distinct behaviors on either side of these asymptotes.
    • The graph's shape suggests that it could be modeled by an equation of the form: y=A(x+2)(x3)y = \frac{A}{(x + 2)(x - 3)} where AA is a constant to be determined.
  4. Finding the Constant AA:

    • Substitute x=0x = 0 and y=0.3y = -0.3 (the y-intercept) into the equation to find AA: 0.3=A(0+2)(03)-0.3 = \frac{A}{(0 + 2)(0 - 3)} 0.3=A6-0.3 = \frac{A}{-6} A=0.3×6=1.8A = -0.3 \times -6 = 1.8

    Therefore, the equation for the function is: y=1.8(x+2)(x3)y = \frac{1.8}{(x + 2)(x - 3)}

Final Answer

The equation for the function is: y=1.8(x+2)(x3)y = \frac{1.8}{(x + 2)(x - 3)}

Would you like further details or have any questions about the solution?

Here are five related questions to explore further:

  1. How would you determine the horizontal asymptote of this function?
  2. What happens to the function as xx approaches 2-2 and 33?
  3. How can you find the x-intercepts of a rational function like this?
  4. What would the graph look like if the numerator were a different value or function?
  5. How does changing the constants in the denominator affect the location of vertical asymptotes?

Tip: When analyzing graphs of rational functions, always look for vertical and horizontal asymptotes first. They provide crucial clues about the function's form and behavior.

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Math Problem Analysis

Mathematical Concepts

Algebra
Rational Functions
Asymptotes

Formulas

y = A / [(x + a)(x - b)]

Theorems

Intercepts of Rational Functions
Behavior of Functions near Asymptotes

Suitable Grade Level

Grades 10-12