Which of the follwoing is a reflection of (2,4) across the x axis

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.

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?