Question

Can someone explain me what an interval is? D=

Answer 1

a space between 2 things.

Answer 2

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

Answer 3

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

Answer 4

Hmm can you give me visual example? :o

Answer 5

like that?

Answer 6

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

Answer 7

but idk what they r

Answer 8

the intervals of increase/decrease?

Answer 9

Yes, yes exactly

Answer 10

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

Answer 11

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

Answer 12

So is it increasing right?

Answer 13

I think i'm starting to understand

Answer 14

haha thanks <3

Answer 15

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

Answer 16

at a certain point it starts going down

Answer 17

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