slope if a line is vertical , it has an undefined slope
{"Image DocumentName": "Slope If a line is vertical, it has an undefined slope.", "Image ImageDescription": "If a line is horizontal it has. a slope equal to 0. x. y. x. y.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}