Question 349583
First graph the line {{{y=3x+1}}}
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{{{graph(300,300,-5,5,-5,5,3x+1)}}}
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Now choose a point not on the line.
({{{0}}},{{{0}}}) is a convenient choice.
Test the inequality with this point.
If the ineqaulity is satified, ({{{0}}},{{{0}}}) is in the solution region, shade that region.
If the inequality is not satisified, ({{{0}}},{{{0}}}) is not in the solution region, shade the other region.
{{{y<3x+1}}}
{{{0<3(0)+1}}}
{{{0<1}}}
True, shade the region containing ({{{0}}},{{{0}}}).
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 *[invoke plot_any_inequality "y<3x+1", -5, 5, -5, 5, 300, 300]