Which of the following shows 3 + (x + 6y) rewritten using the associative property of addition?
a 3 + x + 6y
b 3x + (6 + y)
c x + (3 + 6y)
d (3 + x) + 6y

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.