$90 because 200-10=180 and divide 180 by 2 which is 90.
Answer is C.
The sample is selected at tandon from the population, but it was done on a particular day of the week. So the sample is not random.
More data should be taken, distributed on every day of the week, probably in different months.
First, we are going to write it like this:

Then, we are going to do something like factoring, but it's not factoring. An example would be:

If we apply it, we would be left with:

We cancel the common factors, and we are left with:

That's our final answer.
Let me know if you need any more help!
Thanks!
-TetraFish
Answer:
To easily solve this question, we must realize that the graph of the relation is very similar to that of the expression
y = √(x-a) , where a>0
If we take a look at the image attached, we have plotted the graph of
y = √(x-1) , and its correspondent inverse function.
This means that the answer is the first option