In Exercises 113–116, determine whether each statement is true or false. If the statement is false, make the necessary change(s) to produce a true statement. 113. A linear function with nonnegative slope has a graph that rises from left to right. 114. Every line in the rectangular coordinate system has an equation that can be expressed in slope-intercept form. 115. The graph of the linear function 5x + 6y = 30 is a line passing through the point (6, 0) with slope -- 116. The graph of x = 7 in the rectangular coordinate system is the single point (7,0).

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