 equ7.
 The interval notations [a,b], [a,b), (a,b), and (a,b] each have
different meaning because of the meaning of the (, ), [, or ] which indicate the
inclusion or exclusion of the endpoints of the interval. Use the endpoints 2 and 6.
Write notes in words and with a number line to illustrate each of the four intervals
 1st: State interval using the interval notation.
 2nd: Draw a number line indicating the interval.
 3rd: Describe the interval in English.

