The polynomial −2x3 − x2 + 13x in the last line is the result of dividing x2 + 3x + 1 by 3x2 and bringing
down 13x.

subtracting 3x4 + 9x3 + 3x2 from the
dividend and bringing down 13x .

multiplying 3x2 by x2 + 3x + 1.

Which term best describes the association between variables a and b? no association a negative linear association a positive linear association a nonlinear association a scatterplot with an x axis labeled, variable a from zero to ten in increments of two and the y axis labeled, variable b from zero to one hundred forty in increments of twenty with fifteen points in a positive trend.

Which one ? is the answer and how to find this answer

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.