caption: Graph intervals on a number line. (cont'd)
exif: {"Image DocumentName": "Graph intervals on a number line. (cont\u2019d)", "Image ImageDescription": "The set of numbers less than or equal to 2 is an example of an interval on the number line. To write intervals, we use interval notation. For example, the interval of all numbers less than or equal to 2 is written (\u2212\u221e, 2]. The negative infinity symbol \u2212\u221e does not indicate a number, but shows that the interval includes all real numbers less than 2. As on the number line, the square bracket indicates that 2 is part of the solution. A parentheses is always used next to the infinity symbol. The set of real numbers is written as (\u2212\u221e, \u221e). Slide", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}