Stupid domain question:

Question

melissa_something · Answer

attachment

melissa_something · Answer

Why is that the domain? When will it ever not be that?

melissa_something · Answer

ik its b but wtf

saifoo.khan · Answer

Domain = Values of x till where the function can go.
Range = Values of y till where the function can go..

melissa_something · Answer

I know that, but it can't go to infinity?

saifoo.khan · Answer

attachment

melissa_something · Answer

It stops at  -4 :(

saifoo.khan · Answer

Yes. You're right.

melissa_something · Answer

OMG LET ME LOOK hold on!

melissa_something · Answer

Oh that's perfect

saifoo.khan · Answer

And the -4 is included since it is a solid curve (not a dotted curve).

melissa_something · Answer

One last thing, how do you know which bracket?

amistre64 · Answer

if its equal to, then draw an equals sign and connect it with a bar ...

|dw:1427557705192:dw|

a square bracket IS an equals sign

melissa_something · Answer

Thanks! But what do you mean = to?

melissa_something · Answer

im sorry guys, math isn't my strongest subject!

amistre64 · Answer

spose the values of x are in an interval from 4 to 8, but it is equal to and bigger than 4, but less than 8

|dw:1427557818498:dw|

melissa_something · Answer

Oh okay!

amistre64 · Answer

the brackets define an interval and the endpoints are either a part of (equality) or not a part of (greater than or less than) the domain

melissa_something · Answer

So pretty much in a parabola like that facing up the domain will always be (-infinity, infinity)?

amistre64 · Answer

if the graph is of the entire parabola, then yes.