Unit 1 Ap precalc revision

function

matches each input to exactly one output.

Domain

means the allowed inputs.

Range

means the outputs you actually get.

independent variable

is the input.

dependent variable

is the output because it depends on the input.

Two functions are equal

• they have the same domain

• they give the same output for every input in that domain

function is increasing

on an interval if bigger inputs give bigger outputs.

function is decreasing

on an interval if bigger inputs give smaller outputs.

Concave up

rate of change is increasing, graph bends upward

Concave down

rate of change is decreasing, graph bends downward

zero

is an input where the output is 0.