Question

How do you find the domain and range of a function?

Answer 1

There are many functions,
we try an easy one;
y = 2 + x
this is a linear function

Answer 2

Firs you must determine what the values are for variable X
this is the DOMAIN, in this case X can be any real value
so Domain f(x) = R

Answer 3

Inmediatly you determine what the values are for Y
this is the RANGE, this case Y can be any real number
so Range f(x) = R

Both cases Domain and Range are the set of Real Numbers = R

Answer 4

well it was a pleasure to help you

Answer 5

Thank you! So here's my other question. I have the function sqrt(9)-x^2.
How do I do it for that problem?

Answer 6

you mean this?

Answer 7

Actually it's this: