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As we can see, the point lies within the shaded area, so it is a solution to this inequality.

b

At first glance one might think that this point is within the solution set. However, because it lies **on** the dashed line, and the dashed line is **not** included in the inequality, it's not a solution.

c

As we can see, the point does not lie within the shaded area, so it is **not** a solution to this inequality.