![]() ![]() Also, if x = 3 then y = 4, since 3 + 4 = 7. For instance, if x = 5 then y - 2, since 5 + 2 = 7. In other words, we will sketch a picture of an equation in two variables.Ĭonsider the equation x + y - 7 and note that we can easily find many solutions. In this section we will discuss the method of graphing an equation in two variables. Graphs are used because a picture usually makes the number facts more easily understood. You can usually find examples of these graphs in the financial section of a newspaper. There are many types of graphs, such as bar graphs, circular graphs, line graphs, and so on.
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