What is the Slope of this line?

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.

Bring the fraction a/a-4 to a denominator of 16-a^2

Rewrite the polynomial -9x5 + 36x4 + 189x3 in factored form.