You can always match 4 points using a cubic polynomial. A graphing calculator can find a cubic regression equation for you. This set of points is matched by
.. y = x^3 +3x^2 +5x +3
.. y = x^3 +3x^2 +5x +3
Find the slope and the y-intercept of the line with the equation 8y - x + 7 = 0.
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