The figure at the right shows a line that has a positive slope (because it rises from

Chapter 3, Problem 15

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The figure at the right shows a line that has a positive slope (because it rises from left to right) and a positive y-value for the y-intercept (because it intersects the y-axis above the origin).For each line in Exercises 1520, decide whether (a) the slope is positive, negative, or zero and (b) the y-value of the y-intercept is positive, negative, or zero.xy

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