Number lines / algebra. can anyone tell me to answers to all of these number lines below.

Asap 25 pts brainliest to right best/answer

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.

Solve 2x+y=3 x+y=5 in substitution method