SYSTEMS OF EQUATIONS Solving Graphically (Page 1 of 8)

To solve a system of two equations graphically, we make use of the fact that any ordered pair in the solution set must be a point of intersection of the graphs of the two equations. We can find these points of intersection using the CALC intersect command.

Let's solve the system of equations x+3y = 2; x^2-y = 1 graphically. First, isolate y so that each equation can be represented as a function (or a union of two or more functions). Doing so, we obtain y = (2-x)/3 and y = x^2-1. Enter the first function as Y1 and the second as Y2.

 Y= key. (Clear any previous functions)

 Left parenthesis key. 2 Minus key. X,T,theta,n key. Right parenthesis key. Divide key. 3 ENTER key.
 X,T,theta,n key. x-squared key. Minus key. 1

 Calculator screen image.
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