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👀AP Calculus AB/BC Unit 4 Vocabulary

26 essential vocabulary terms and definitions for Unit 4 – Contextual Applications of Differentiation

Study Unit 4
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👀Unit 4 – Contextual Applications of Differentiation
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👀Unit 4 – Contextual Applications of Differentiation

4.1 Interpreting the Meaning of the Derivative in Context

TermDefinition
derivativeThe instantaneous rate of change of a function at a specific point, representing the slope of the tangent line to the function at that point.
independent variableThe input variable of a function, typically represented as x, with respect to which the rate of change is measured.
instantaneous rate of changeThe rate at which a function is changing at a specific point, represented by the derivative at that point.

4.2 Straight-Line Motion

TermDefinition
accelerationThe derivative of the velocity function with respect to time, representing the rate of change of velocity for a moving particle.
derivativeThe instantaneous rate of change of a function at a specific point, representing the slope of the tangent line to the function at that point.
positionThe location of an object along a straight line, typically represented as a function of time.
rate of changeThe measure of how quickly a quantity changes with respect to another variable, often time.
rectilinear motionMotion of a particle along a straight line, characterized by changes in position, velocity, and acceleration.
speedThe magnitude of the velocity vector, representing the rate at which a particle is moving without regard to direction.
velocityThe derivative of a position function with respect to time, representing the rate and direction of change of position for a moving particle.

4.3 Rates of Change in Applied Contexts other than Motion

TermDefinition
derivativeThe instantaneous rate of change of a function at a specific point, representing the slope of the tangent line to the function at that point.
rate of changeThe measure of how quickly a quantity changes with respect to another variable, often time.

4.4 Intro to Related Rates

TermDefinition
chain ruleA differentiation rule that provides a method for finding the derivative of a composite function by multiplying the derivative of the outer function by the derivative of the inner function.
product ruleA differentiation rule that states the derivative of a product of two functions equals the first function times the derivative of the second plus the second function times the derivative of the first.
quotient ruleA differentiation rule used to find the derivative of a quotient of two differentiable functions.
related ratesProblems in which the rates of change of two or more related quantities are connected, and the derivative is used to find an unknown rate of change from known rates.

4.5 Solving Related Rates Problems

TermDefinition
derivativeThe instantaneous rate of change of a function at a specific point, representing the slope of the tangent line to the function at that point.
rate of changeThe measure of how quickly a quantity changes with respect to another variable, often time.
related ratesProblems in which the rates of change of two or more related quantities are connected, and the derivative is used to find an unknown rate of change from known rates.

4.6 Approximating Values of a Function Using Local Linearity and Linearization

TermDefinition
locally linear approximationAn approximation of a function's behavior in a small region around a point using a linear function, typically the tangent line at that point.
overestimateAn approximation that is greater than the actual value of a function.
point of tangencyThe point where a tangent line touches a curve.
tangent lineA line that touches a curve at a single point and has a slope equal to the derivative of the function at that point.
underestimateAn approximation that is less than the actual value of a function.

4.7 Using L'Hopitals Rule for Determining Limits in Indeterminate Forms

TermDefinition
indeterminate formsLimit expressions that do not have a determinate value without further analysis, such as 0/0 or ∞/∞.
L'Hospital's RuleA method for evaluating limits of indeterminate forms by taking the derivative of the numerator and denominator separately.