Derivative Graphs

positive

When f is increasing, f' is

negative

When f is decreasing, f' is

increasing

When f is concave up, f' is

decreasing

When f is concave down, f' is

positive

When f is concave up, f" is

negative

When f is concave down, f" is

zero or is undefined

When f has a critical point, f' has a

extrema

When f has an inflection, f' has an

zero

When f has an inflection, f" has a

critical point

when the derivative is zero or undefined

Mean Value Theorem

Says that the graph of a continous and differential function has a secant line that equals the tangent line at some point or points on an interval.

Extreme Value Theorem

Says that a continuous function must have an absolute maximum point and minimum point over the interval [ a , b ]

First Derivative Test

Finds possible extrema, increasing and decreasing intervals of a function.

Second Derivative Test

Finds inflection points and concavity of a given function

Derivative does not exist

at points on a graph where there is asymptotes, holes, jump discontinuity, infinite oscillations, cusp or corner.

Slope of the tangent line

Instantaneous rate of change or derivative

Slope of the secant line

average rate of change or slope

velocity

the derivative of distance over time

acceleration

the derivative of velocity or the second derivative of distance over time

increasing

When f' is positive, f is

decreasing

When f' is negative, f is

extrema

When f' crosses the x-axis, f has a/an

concave up

When f" is positive, f is

concave down

When f" is negative, f is

inflection

When f" crosses the x-axis, f has a/an