Graphing with a calculator is an easy way to solve almost any system. It is easily done with any graphing calculator such as a Texas Instruments Ti-83. For this page we will assume this is the calculator you are using. This method is extremely easy when the two equations are already in y- intercept form. However if it is not it is still a very good method to use. All you have to do is isolate y on one side, and it is a good thing that the calculator does not care how "ugly" it turns out. With correct use of parentheses, it is very easy.

Let's try it:  

Example:

y = 2x + 5
3y - 3x = 3

The first equation is ready for the calculator, but we must change the second equation into y- intercept form.   >
3y = 3x +3
y = (3x + 3)/ 3

Now just graph these two equations on your graphing calculator  >
On a Ti-83, to find the intersection of two lines that you have graphed you have to press the CALC button and press enter three times. Then it will show this screen V

The point of intersection is ( -4, -3 )

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