it's the first answer choice
Step-by-step explanation:
If you add all the pieces of data up and divide the total number by 8 (the amount of pieces of data) you will get the mean. For median you just order them from least to greatest and find the one in the middle. Lastly, for mode you just choose the number that shows up the most.
Answer:

Step-by-step explanation:
Let
represent number of tickets and
represent the total cost to purchase them.
Now,assuming the relation to be of the form:
, where,
and
are constants.
Let us find
and
using the values from the table.
For,
. So,

For,
. So,

Subtract equation 1 from equation 2. This gives,

Now, plug in
in equation 1 and solve for 

Therefore, the relation between the number of tickets and total cost of purchase is given as:

Because in the function f(x) all you do is plug in the value that is given...7
2*7-5=14-5=9
Your answer is 9.