Question 882831
First graph {{{y=2x+3}}}}
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{{{graph(300,300,-5,5,-5,5,2x+3)}}}
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Now choose a point not on the line and test the inequality,
(0,0) is convenient.
{{{0>=2(0)+3}}}
{{{0>=3}}}
False, so (0,0) is not in the solution region. 
Shade the other region.
The line is included as part of the solution because of the equal in the inequality.
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{{{graph(300,300,-5,5,-5,5,y>=2x+3)}}}