Prove that (3n+ 1)^2– (3n-1)^2is a multiple of 4, for all positive integer
values of n.

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.

What is the factored form of the following expressions? d^2 – 13d + 36

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)