Math Problem Statement

Given the graph of f(x) below. Determine the average rate of change of f(x) from x = 2 to x = 4.

Solution

To determine the average rate of change of the function f(x)f(x) from x=2x = 2 to x=4x = 4, we use the following formula for the average rate of change:

Average rate of change=f(x2)f(x1)x2x1\text{Average rate of change} = \frac{f(x_2) - f(x_1)}{x_2 - x_1}

where x1=2x_1 = 2 and x2=4x_2 = 4.

From the graph:

  • At x=2x = 2, the corresponding value of f(2)f(2) is approximately 44.
  • At x=4x = 4, the corresponding value of f(4)f(4) is approximately 2-2.

Now, we substitute these values into the formula:

Average rate of change=f(4)f(2)42=2442=62=3\text{Average rate of change} = \frac{f(4) - f(2)}{4 - 2} = \frac{-2 - 4}{4 - 2} = \frac{-6}{2} = -3

Thus, the average rate of change of f(x)f(x) from x=2x = 2 to x=4x = 4 is 3-3.

Would you like further clarification on this?

Here are five related questions you could explore:

  1. What is the geometric interpretation of the average rate of change on the graph?
  2. How would the average rate of change differ if the interval was from x=1x = 1 to x=3x = 3?
  3. Can the average rate of change be interpreted as the slope of the secant line between two points on a curve?
  4. How does the average rate of change compare to the instantaneous rate of change?
  5. What happens to the average rate of change if f(x)f(x) is a linear function?

Tip: The average rate of change between two points on a graph is the same as the slope of the straight line (secant line) connecting those two points.

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Math Problem Analysis

Mathematical Concepts

Average Rate of Change
Secant Line Slope

Formulas

Average rate of change formula: (f(x2) - f(x1)) / (x2 - x1)

Theorems

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Suitable Grade Level

Grades 9-11