average rate of change

average rate of change: the slope of a line between any two pints.

function

dunction: a pairing of inputs with outputs such that each input is paired with exactly one output.

independent variable

independent variable:  the "input: variable.

zero of a function

zero of a function:  is an x-value for which f(x)=0 or y=0

parent function

parent function : the most basic in a family of functions.

parallel lines

parallel lines: two lines in the same plane that do not intersect; and have the same slope.

y-intercept

y intercept: the y-coordinate of a point where a graph crosses the y-axis.