Which of the following is NOT a rational expression?

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.

What is the value of x in the following equation. -x ^3/2 = -27

Can someone me out here and the tell me the greatest common factor