Question 947135
The line is solid since the inequality includes the equal sign.
The line {{{y=-x+1}}} has a y-intercept of 1, so choose a value on the y-axis above the line, say (0,10).
Check the inequality.
{{{10>=-0+1}}}
{{{10>=1}}}
True
So the shading is above the line.
Above the line, line is solid.
B.
.
.
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{{{graph(300,300,-10,10,-10,10,y>=-x+1)}}}