Which numbers is a factor of 100? 8 12 15 20

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.

Witch represents the inverse of the function f(x)=1/4x-12

Find the domain of the following expression: 1/(√x)-2