3a+a+2a-5a?

Can someone give me the answer please?

Ty

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.

Whats the name of the vertical axis

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?