Schedules were strongly included into daily activity of representatives of different professions – from economists to workers of statistics and account. It is caused by presentation of schedules that allows to provide more expressively and laconically various data. At the same time it must be kept in mind that high rates of development of computer technologies in the future will give to graphic methods of display of information still big relevance. Therefore the ability to build and read schedules becomes very important skill today.
It is required to you
- paper, ruler, pencil
Instruction
1. Construct the system of coordinates. It is necessary "to tie" future schedule functions to a certain reference point. The most widespread around the world is rectangular or as it is called still, the Cartesian system of coordinates. It represents two axes which are crossed at right angle – x and y.
2. Set a reference mark point. It is the point of intersection of axes to which coordinates x =0 are appropriated; y = 0.
3. Set the scale of a system of coordinates for the correct creation of a function graph. For this purpose on both axes postpone equal pieces which consistently number. Numbering can be as positive (it is conducted from the beginning of coordinates on an axis x and up axis y to the right), and negative (it is conducted from the beginning of coordinates on an axis x and down axis y to the left). As a result the space which any point can be described by a set of coordinates x, y turns out.
4. Calculate coordinates of points of a function graph. It can be done, proceeding from the description of the function. Most often the similar description represents dependence of one coordinate on another. That is, randomly having defined several values of coordinate x, and, using the description of function, it is possible to calculate the corresponding values of coordinate of y.
5. Construct a function graph. The simplest option – creation of a linear function graph. For this purpose it is enough to know coordinates of only two points. They are postponed on the coordinate plane then connect. As a result the schedule of this function turns out. Schedules of more difficult functions are based on the same principle. The only difference is only in what for more exact construction it is required to define previously more, than two points.