Table of contents
- 0. Functions7h 52m
- Introduction to Functions16m
- Piecewise Functions10m
- Properties of Functions9m
- Common Functions1h 8m
- Transformations5m
- Combining Functions27m
- Exponent rules32m
- Exponential Functions28m
- Logarithmic Functions24m
- Properties of Logarithms34m
- Exponential & Logarithmic Equations35m
- Introduction to Trigonometric Functions38m
- Graphs of Trigonometric Functions44m
- Trigonometric Identities47m
- Inverse Trigonometric Functions48m
- 1. Limits and Continuity2h 2m
- 2. Intro to Derivatives1h 33m
- 3. Techniques of Differentiation3h 18m
- 4. Applications of Derivatives2h 38m
- 5. Graphical Applications of Derivatives6h 2m
- 6. Derivatives of Inverse, Exponential, & Logarithmic Functions2h 37m
- 7. Antiderivatives & Indefinite Integrals1h 26m
- 8. Definite Integrals4h 44m
- 9. Graphical Applications of Integrals2h 27m
- 10. Physics Applications of Integrals 2h 22m
4. Applications of Derivatives
Related Rates
Problem 3.6.3
Textbook Question
Complete the following statement. If dy/dx is small, then small changes in x will result in relatively ______ changes in the value of y.

1
Understand the concept of the derivative: The derivative \( \frac{dy}{dx} \) represents the rate of change of \( y \) with respect to \( x \). It tells us how much \( y \) changes for a small change in \( x \).
Interpret the meaning of a small \( \frac{dy}{dx} \): If \( \frac{dy}{dx} \) is small, it means that the rate of change of \( y \) with respect to \( x \) is small. In other words, \( y \) does not change much as \( x \) changes.
Relate small \( \frac{dy}{dx} \) to changes in \( y \): Since \( \frac{dy}{dx} \) is small, small changes in \( x \) will result in small changes in \( y \). This is because the slope of the tangent line to the curve at that point is shallow.
Visualize the graph: Imagine a graph where the slope of the tangent line is nearly flat. As you move along the \( x \)-axis, the \( y \)-value changes very little, indicating a small change in \( y \).
Complete the statement: Therefore, if \( \frac{dy}{dx} \) is small, then small changes in \( x \) will result in relatively small changes in the value of \( y \).

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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Derivative
The derivative, denoted as dy/dx, represents the rate of change of a function y with respect to a variable x. It quantifies how much y changes for a small change in x, providing insight into the function's behavior at specific points. A small derivative indicates that y changes little when x changes, suggesting a flat slope on the graph of the function.
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Differential
A differential is an infinitesimal change in a variable, often represented as dy for changes in y and dx for changes in x. In the context of derivatives, it helps to express the relationship between small changes in x and the resulting changes in y. The concept of differentials is crucial for understanding how small variations in input affect output in calculus.
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Continuity
Continuity refers to a property of functions where small changes in the input (x) lead to small changes in the output (y). A continuous function does not have abrupt jumps or breaks, ensuring that the behavior of the function is predictable. This concept is essential for understanding the implications of small derivatives, as it guarantees that the relationship between x and y remains stable under small perturbations.
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