Question 1035105
The first step is to graph the line {{{y=x-1}}}.
The line breaks the plane into two regions. 
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So then if you have an inequality, {{{y>=x-1}}}, it would be shade the region above the line and include the line. You're choosing y values above the line for each x value. Equally if it was, {{{y<=x-1}}}, it would be shade the region below the line and also include the line. You;re choosing y values below the line for each given x value.
Additionally, if it doesn't include the equal sign, it would not include the line. 
So its the region below the line and since the line is solid it would include the line.
So then the answer is,
{{{y<=x-1}}}