40. The correct answer is (B). Since y = 1 when x = 0, the y-intercept is 1. We see from the table that as
x increases 1 unit, y increases 2 units, so that the slope of the line must be two. It can be seen also from
the table that the slope is constant, for when x increase 3 units, y increases 6 units, again yielding a
slope of 2. The equation of the line is
y = 2x + 1
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