SOLUTION: When graphing a linear inequality, how do you know if the inequality represents the area above the line? What are the necessary and sufficient conditions for inequalities to rep

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Question 204893: When graphing a linear inequality, how do you know if the inequality represents the area above the line?
What are the necessary and sufficient conditions for inequalities to represent an area in the first quadrant?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
When graphing a linear inequality, how do you know if the inequality represents the area above the line?
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Check the x/y values of a point above the line in the inequality.
If you get a true statement the entire solution set is above the line.
If you get a false statement the entire solution set is below the line.
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What are the necessary and sufficient conditions for inequalities to represent an area in the first quadrant?
x>0 and y>0
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Cheers,
Stan H.