How to write four and eight tenths in word in standard form

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.

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Which expression is not a polynomial?