The standard form of a linear equation is Ax + By = C. If B = 0 and A and C are positive, which best describes the graph of this equation?

With B = 0, the equation Ax + By = C becomes Ax = C. Since A is positive, divide both sides by A to get x = C/A, a fixed x-value. The graph of an equation with a fixed x-value is a vertical line, so the best description is “The graph is a vertical line.”

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