Which scenario has a unit rate of 15 laps per hour

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.

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Rationalize the denominator- 12x/√x-10