The equation y= 1/3 x is the boundary line for the inequality y ≥ 1/3 x Which sentence describes the graph of the inequality?

a. The region shaded above a solid boundary line.

b. The region shaded below a dashed boundary line.

c. The region shaded above a dashed boundary line.

d. The region shaded below a solid boundary line.

Since the variable y is no less than the right-hand side, the inequality graph is the shaded region above a solid boundary line (the line y = x/3 also belongs to the graph).

Answer: a.

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