Subtract and then simplify

Which rational number could be graphed between -4 and -5

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.

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us