2nd or 3rd option I hope I narrowed it down
Answer:

Step-by-step explanation:
Formula for slope

As the Line AB contains points A (8, −4) and B (1, −5).
Put points value in the above






Answer:
95% confidence interval: (0.325 ,0.383)
Step-by-step explanation:
We are given the following in the question:
Sample size, n = 231
Sample mean = 0.354 ppm
Sample standard deviation = 0.231 ppm
95% confidence interval:
Putting the values, we get,
Answer:
It is xy
Step-by-step explanation:
The unit price would be $8.
48/6 = 8