What is the slope of the blue line and the green line simplified

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Question: a) does the given set of points represent a linear function? how do you know? b) assume that the point (-2,4) lies on the graph of a line. what y-values could complete this set of ordered pairs that lie on the same line: (- (hint: there are several correct answ

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2