Intervals - x 2} 2. Open interval (see Figure 7). { x: 2...

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Intervals An  interval  consists of all the numbers that lie within two certain boundaries. If the two boundaries,  or fixed numbers, are included, then the interval is called a  closed interval.  If the fixed numbers are  not included, then the interval is called an  open interval.   Example 3 Graph. 1. Closed interval (see Figure 6).  x : –1 ≤ 
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Unformatted text preview: x 2} 2. Open interval (see Figure 7). { x: 2 < x < 2} Figure 6. A graph showing closed interval { x : 1 x 2}. Figure 7. A graph showing open interval { x : 2 < x < 2}. If the interval includes only one of the boundaries, then it is called a half-open interval....
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