A line passes through the points (2, 5) and (9, 5). What is its slope?
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Correct answer to question 76 (Mathematics Knowledge): 0
Method
Both points have the same y value, so the line is horizontal and rises not at all: the change in y is 0, and 0 divided by 7 is 0. A vertical line, by contrast, has an undefined slope.
Updated: November 2026
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