Why was the variable with 6.50?

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.

What is the 12th term of b(n)=-4-2(n-1)

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)