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Use similar triangles to determine the slope of the line.
(0, 0) (1, 3) (2, 6) (3, 9)
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GPT-5 mini
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Slope = rise/run. Using (0,0) and (1,3): m = (3−0)/(1−0) = 3.
Check with other pairs: (2,6)−(1,3) gives (6−3)/(2−1)=3, (3,9)−(0,0) gives (9−0)/(3−0)=3.
By similar triangles the rise 3 over run 1 is constant, so the slope is 3.
Check with other pairs: (2,6)−(1,3) gives (6−3)/(2−1)=3, (3,9)−(0,0) gives (9−0)/(3−0)=3.
By similar triangles the rise 3 over run 1 is constant, so the slope is 3.
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