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Which of the following is the equation of a line in slope-intercept form?

  1. y = -3x + 2

  2. y + 3 = 2

  3. x2 = 9

  4. y2 = 3

The correct answer is: y = -3x + 2

A line in slope-intercept form can be represented as y = mx + b, where m is the slope of the line and b is the y-intercept. Only option A follows this form, with a slope of -3 and a y-intercept of 2. Option B is not in slope-intercept form and does not have a defined slope. Option C and D are both quadratic equations, not linear equations in slope-intercept form. Thus, the correct answer is A.