Pls help I’m so confused

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.

Write two point-slope equations for the line passing through the points (6, 5) and (3, 1)

Percent increase and decrease. original number: 45 new number: 18