Find an equation for the line tangent to the graph of 2x f(x) %3D x + 4 at the point (2, 0.666666666666667).

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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**Finding the Equation of the Tangent Line to a Graph**

To find the equation for the line tangent to the graph of the function 

\[ f(x) = \frac{2x}{x + 4} \]

at the point \((2, 0.66666666666667)\).

Below the instruction, there is an empty input box where students can input the equation of the tangent line in the form \( y = \).

### Explanation:
1. **Identify the Function**: The function given is \( f(x) = \frac{2x}{x + 4} \).
2. **Given Point on the Graph**: The point at which the tangent line is to be found is \((2, 0.66666666666667)\).
3. **Objective**: Find the equation of the tangent line to the graph of \( f(x) \) at the given point.

### Steps to Find the Tangent Line Equation:
1. **Find the derivative of the function** \( f(x) \) to determine the slope of the tangent line.
2. **Evaluate the derivative at \( x = 2 \) to find the slope at the given point**.
3. **Use the point-slope form of the equation of a line**:

\[ y - y_1 = m(x - x_1) \]

where \( (x_1, y_1) \) is the point \((2, 0.66666666666667)\) and \( m \) is the slope found in step 2.

### Input Your Answer:
Students will input their final equation for the tangent line in the designated box provided. 

---
This structured explanation helps guide learners through the process of finding the tangent line step-by-step.
Transcribed Image Text:**Finding the Equation of the Tangent Line to a Graph** To find the equation for the line tangent to the graph of the function \[ f(x) = \frac{2x}{x + 4} \] at the point \((2, 0.66666666666667)\). Below the instruction, there is an empty input box where students can input the equation of the tangent line in the form \( y = \). ### Explanation: 1. **Identify the Function**: The function given is \( f(x) = \frac{2x}{x + 4} \). 2. **Given Point on the Graph**: The point at which the tangent line is to be found is \((2, 0.66666666666667)\). 3. **Objective**: Find the equation of the tangent line to the graph of \( f(x) \) at the given point. ### Steps to Find the Tangent Line Equation: 1. **Find the derivative of the function** \( f(x) \) to determine the slope of the tangent line. 2. **Evaluate the derivative at \( x = 2 \) to find the slope at the given point**. 3. **Use the point-slope form of the equation of a line**: \[ y - y_1 = m(x - x_1) \] where \( (x_1, y_1) \) is the point \((2, 0.66666666666667)\) and \( m \) is the slope found in step 2. ### Input Your Answer: Students will input their final equation for the tangent line in the designated box provided. --- This structured explanation helps guide learners through the process of finding the tangent line step-by-step.
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