MATH DICTIONARY

Definition: An angle is the inclination or turn from one ray (initial) to another ray (terminal) relative to a common point.

Definition: Graphically the domain can be described as the horizontal span of the graph of a function when it is projected on the x-axis. The domain can be thought of as the width of the graph of a function. The range on the other hand is the vertical span of the graph of a function when it is projected on the y-axis. It can be thought of as the height of a function.

Definition: A function from a set A to a set B is a relation that assigns to each element x in the set A exactly one element y in set B. The set A is the domain and the set B is the range.