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A. y = 2x - 1

Explanation: The slope-intercept form goes as follows: y = mx + b, where m is the slope, and b is the y-intercept. Given the info supplied by the question, we can fill in the equation by plugging in a 2 for m, the slope, and -1 for b, the y-intercept.

We know -1 is the y-intercept because points are written in an (x, y) format, and the question says the line passes through the point (0, -1). Therefore, the line must have -1 subtracted from its slope at every point, because it does not pass through (0, 0).