can someone please help me in understanding graphing quadratic inequalities?
look at this (answers are below)
http://www.kutasoftware.com/FreeWorksheets/Alg1Worksheets/Graphing%20Quadratic%20Inequalities.pdf
what does the solid/shaded line mean? Why is it shaded in and some are shaded out? I know how to get the coordinates by plugging in random x values, but I don't know about anything else.

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so now we need to consider the line y=4. this will be a horizontal line which passes through y=4.

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