I am not sure when to use test points on some of these.
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Originally Posted by cytotoxictcell I am not sure when to use test points on some of these. First surely it is $\displaystyle 3x-y<3$ and not $\displaystyle 3y-y<3$. If the line does not contain $\displaystyle (0,0)$, then that is the easiest point to use. Also in the case of strict inequality, $\displaystyle <~,$ use a dashed line.
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