C. If the first coefficient is negative, then the graph opens downwards
Solution: The formula for mean is:

Where:
is the sum of given observations
is the number of observations


rounded to two decimal places
To find the median, we need to first arrange the data in ascending order but we are already given the data in ascending order.
Therefore, the median is:






Therefore, the median = 1.53
4.57142857143
Step-by-step explanation:
I googled it
8x10 would be 80 which means 9x80 would be....? Try to answer on own first!
Answer: 720
Hope this helped and you tried on your own first then checked your answer!