Which relation is a function?

Which best describes the strength of the correlation, and what is true about the causation between the variables? it is a weak negative correlation, and it is not likely causal. it is a weak negative correlation, and it is likely causal. it is a strong negative correlation, and it is not likely causal. it is a strong negative correlation, and it is likely causal.

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"

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