Math (Algebra)

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I sent my professor asked the pros and cons of each method, I answered with this;

When graphing; pros are that graphing gives you a picture of what the solution is. Cons would be is that graphing is not always accurate and it is difficult to see the location of the points. (Another problem I have personally is graphing the points backwards.) When using substitution; pros are that the solution is more accurate. Cons are that there would be multiple solutions for an equation. Elimination pros would be that it works for almost every equation. Cons would be that although some believe it to be easier, I find it more difficult to do because I do not always know what to eliminate. I like the substitution method best because I can use whichever number I would like for the variable to solve the problem. If the equation had many variables I would use elimination because this would be easier then substituting.

She than responded back to me with this;

Hi Diana, You did a great job explaining each method. You graphically described each situation that can occur when solving systems of equations. Can you classify each situation?

My question is what does she mean by classify each situation? Does she want an example of each situation?

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