Please hurry I need this fast

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.

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

Solve for x: 5/3 x = 20/21 it's fraction. remember to simplify your fraction