Posted by **Tara** on Wednesday, April 2, 2008 at 2:22pm.

What is the difference between domain and range? Describe a real life situation that could be modeled by a function?

I think I understand domain and range. Domain is the x axis and range is the y axis correct?

I need help with applying it to real life.

Thank you.

- Algebra -
**Anonymous**, Wednesday, April 2, 2008 at 6:26pm
Close. The domain is all the possible x values and the range is all the possible y values. *I'm sure there is a more general way of phrasing it but my english sucks sorry.*

Lets use an example y = x.

There is no restrictions such as undefines so the domain and range are all real values.

y = sqrt(x). In this case x cannot be negative. The lowest value of x that will still give us a real number is 0 and the is no max so the domain is 0 to infinity. The range cannot be lower than 0 because there is no x value that will return a number lower than 0. The max is infinity because as x goes to infinity so does y(if you don't understand what this means please ask).

A function can be very simple. Like..

The price of one apple is 10 cents. Jack wants to buy x number of apples What is the price of x apples?

Err it's crude example but I can't think of anything else right now >.<.

Just a note, one property of a function is that every x value has one and only one y value. So as long as a real life situation does not have two outcomes, it can(I believe) be model as a function.

Best of luck I hope I helped >.<"

- Algebra -
**Tara**, Wednesday, April 2, 2008 at 8:05pm
Yes, thank you!

- Algebra -
**jakalyn**, Thursday, March 4, 2010 at 7:37pm
is the answer 2 apples.

## Answer this Question

## Related Questions

- Algebra - What is the difference between domain and range? Describe a real-life ...
- Algebra - What is the difference between domain and range? Describe a real-life...
- algebra - What is the difference between domain and range? Describe a real-life ...
- Alegbra - I've learned that the difference between domain and range is........
- math - What is the difference between domain and range? Describe a real-life ...
- math - What is the difference between a domain and a range? Describe a real ...
- math - What is the difference between domain and range? Describe a real life ...
- math - What is the difference between domain and range? Describe a real-life ...
- math - What is the difference between a domain and a range? Describe a real life...
- Math - HELP PLEASE!!! I'm having some trouble with this question on my Maths hw...

More Related Questions