The line that includes whatever variables are included in the equation.
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It means that the inequality is less than the value of the dashed line and is not equal to it.
The first is 2-dimensional, the second is 1-dimensional.
Whereas the procedure for a linear equality is the same, the inequality defines all of the plane on one side (or the other) of the corresponding line.
When graphing inequalities you use a circle to indicate a value on a graph. If the value is included in the solution to the inequality you would fill in the circle. If the value that the circle represents is not included in the solution you would leave the circle unshaded.
In an inequality, you have to shade a side of a line to see show if the possible answers are greater than or equal to it