We are asked to decide if the expression:
x^2 + y^2 = 1 represents a function.
We recall that in order to have a function, we need for a given value of x to have a SINGLE value of y associated with it.
So in this case, when x is 0 for example, we have the following:
0^2 + y^2 = 1
then y^2 = 1
and we realize that there are TWO values of y whose square form gives 1 (one is 1 and the other -1) Therefore, this relationship is NOT a function, since for example when x = 0 there are TWO values of y to which that x is associated (y = 1 and y = -1).
So please select that this is NOT a function for your answer.
You have a function

.
Since the range of the function

is
![[-1,1]](https://tex.z-dn.net/?f=%5B-1%2C1%5D)
you have that

.
Answer: The range of given function is [0,3] and the correct choice is C.
Answer: r = 1
Step-by-step explanation:
The slope of a line can be represented as
. Plugging in the following values would provide you with:




Hope it helps :) and let me know if you want me to elaborate on anything.
Answer:
1 71years
Step-by-step explanation:
x+10=81
x=71
2. x+8=49
x=41
3. x+11=100
x=99