You can put this solution on YOUR website! find an equation of the line having the given slope and containing the given point. m=-2,(3,6)
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Plug the given information into the "point-slope" form:
y - y1 = m(x - x1)
y - 6 = -2(x - 3)
y - 6 = -2x + 6
y = -2x + 12 (this is what they're looking for: "slope-intercept" form)