Answer:
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Step-by-step explanation:
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Answer:

Step-by-step explanation:
we would like to find the inverse of the following function:

to do so substitute y for f(x):

interchange variables:

cancel 9 from both sides:

square both sides:

add 4 in both sides:

divide both sides by 4:

substitute back:

and we're done!
The mean - add all the numbers (data) divided by the amount. 4+3+1+1+2+4+1 =16 16/7 = 2.28
The median - the middle number.
The mode - the most common number.