## anonymous one year ago Can someone explain me what an interval is? D=

1. anonymous

a space between 2 things.

2. anonymous

as in, fill in the number line within the interval between 3 and 6

3. anonymous

or, the function is rising on the interval of x=3 to x=8

4. anonymous

Hmm can you give me visual example? :o

5. anonymous

|dw:1435762691249:dw|like that?

6. anonymous

7. anonymous

They gave me this graph and i suppose to tell what r the intervals

8. anonymous

but idk what they r

9. anonymous

the intervals of increase/decrease?

10. anonymous

Yes, yes exactly

11. anonymous

interval meaning a space between 2 numbers increasing meaning the function is rising decreasing meaning the function is going down so use your finger and follow the graph from its leftmost point all the way to its rightmost point

12. anonymous

if it's going up, it's increasing on that interval, if it's going down it's decreasing on that interval

13. anonymous

So is it increasing right?

14. anonymous

I think i'm starting to understand

15. anonymous

haha thanks <3

16. anonymous

not always, do you see the vertex of the parabola?

17. anonymous

at a certain point it starts going down

18. anonymous

anyhow, it's increasing on $$(- \infty ,5)$$ and decreasing on $$(5,\infty)$$