Solve a System of Equations by Graphingby Maria Kovoros and Megan Ruiz


Summary:
A System of Equations is a set of two or more equations with the same variables (x and y) graphed on the same coordinate plane.
In order to solve a system of equations by graphing, the answer that you are looking for is an ordered pair (x,y) that makes BOTH EQUATIONS true.
To solve a system by graphing you must:
  1. Solve for y.
  2. Graph both equations on the coordinate plane.
  3. Look for the POINT OF INTERSECTION - this point (x,y) is the point that makes both equations true.

It is also possible to check your answer by:
  1. Plugging BOTH of the answers you got, for x and y, into the original equations making sure BOTH of the solutions work.



Video:

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Further Practice and Tutorials:

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Solving Equations by Graphing
By: Rebecca Jena Baptiste and Sam McGovern


Summary: To solve a system of equations graphically, graph both equations and see where they intersect, with a set of two or more equations with the same variables. The intersection point is the solution. You write the solution in ordered pairs.


Video: Solving Systems by Graphing (Rebecca & Sam)


Tutorial Website