Question

***WILL GIVE MEDAL***

Which of the following statements about functions is incorrect?
A.

The domain is always all real numbers.
B.

Each x-value corresponds to only one y-value.
C.

The range of a function is all the y-values output by the function.
D.

The same y-value can correspond to more than one x-value.

Answer 1

i think d

Answer 2

Here is an example:
f(x) = 1/x
What is the domain?

Answer 3

It's not all real numbers, because when x = 0, f(x) is undefined. (You can't divide by 0.)
So A is incorrect.

Answer 4

(D is actually correct. Look at this picture:)

Answer 5

@cynthia_franco