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To determine the slope of the line using similar triangles, we can compare the rise and run of the line with the rise and run of a known triangle within the image.
By comparing the rise and run of the line with the rise and run of the triangle with sides 1 and 2, we can see that the rise of the line is 3 units and the run of the line is 6 units.
Therefore, the slope of the line is rise/run = 3/6 = 1/2.
So, the slope of the line is 1/2.