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.

Question

asnaseer · Answer

ok, in general, lets say you have some function in the form:$$y=f(x)$$and you have some inequality like:$$y>=4$$

asnaseer · Answer

now, on the line $y=f(x)$ you know the value of 'y' will EQUAL the value of 'f(x)', so we draw the curve for y=f(x) as a solid line to indicate that we need to include this region.

asnaseer · Answer

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

asnaseer · Answer

the horizontal line could intersect the curve at some points. e.g.:
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