Which expression is equivalent to 16x^2- 36

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.

Can someone me with this problem . show your work .

Hi, can anyone show me how to do this problem? 100 points for this. in advance