Inequalities
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If the inequality involves only x, then graph the vertical line x = k.
x > k is the region to the right of the line.
x = k is the line itself.
x < k is the region to the left of the line.
Could there be a horizontal line? What would be it's equation/inequality? How do you decide on a solution for a horizontal line?
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Solution Summary
Graphs of inequalities are investigated for horizontal lines are analyzed.
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Similar to the vertical line, a horizontal line should be y = k. Let me rephrase everything ...
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