Eight times the sum of a number and 4 equals 3

Which function is shown in the graph below?

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.

In triangle opq right angled at p op=7cm,oq-pq=1 determine the values of sinq and cosq