Then, measuring the child on each birthday, we could mark the coordinate at which year and height intersect. If positive and negative quantities of x and y are being graphed, the y axis will need to continue down the page below the x axis, and the x axis will need to continue across the y axis, leftwards. To the left of the the y axis gives negative values of x, below the x axis gives negative values of y. The graph below of the equation y equals x squared has negative values of x, but not of y. Graphical A graphic is a picture or visual representation.
Computer graphics are pictures, graphs and diagrams produced on a computer.
On a table napkin you can draw an outline of the surface of the world around you showing where the different parts are. Your napkin can then be used by other people to find their way around. As rich Romans ate their sumptuous meals, perhaps they amused themselves by drawing maps of their houses or cities to guide their guests. A map is a representation of the surface of the earth, part of it or another planet, usually made on a flat surface. Making such a map is called mapping .