Hey... Any one know what roster notation is?

Symbollically, we use two common methods to write sets. The __roster notation__ is a complete or implied listing of all the elements of the set. So and are examples of roster notation defining sets with 4 and 20 elements respectively. The ellipsis, `` '', is used to mean you fill in the missing elements in the obvious manner or pattern, as there are too many to actually list out on paper. The __set-builder notation__ is used when the __roster method__ is cumbersome or impossible. The set *B* above could be described by . The vertical bar, ``|'', is read as ``such that'' so this notation is read aloud as ``the set of *x* such that *x* is between 2 and 40 (inclusive) and *x* is even.'' (Sometimes a colon is used instead of |.) In set-builder notation, whatever comes after the bar describes the rule for determining whether or not an object is in the set. For the set the roster notation would be impossible since there are too many reals to actually list out, explicitly or implicitly.
The notes i was given had a example of {-5,-4,-3,-2,-1,0...6} but... is that just listing all the numbers on a number line? or is it listing the bold dots on the number line?

also on set-builder notation how do i change a set builder notation into a interval notation? like how do i know witch side would have a ( or a [ for the equation? The problem for this is... {x|x > 10} The > has a line under it. my answer i put was (infinity (positive) , 10] ... Did i do this right?

Not exactly. Interval notation for that would be $\displaystyle (10, +\infty)$
Thankz for the help XD ...

Order the given numbers from least to greatest. Then classify each number by the subsets of the real numbers to which it belongs. 2/3 , 6.17, sqrt28, -3 1/8, -4.9

Can you order these numbers from least to greatest. Not so hard!
i just don't really under stand the second part of the question "Then classify each number by the subsets of the real numbers to which it belongs."

Which of the following sets of numbers does each of those numbers belong? Here are your choices: Real Numbers Imaginary Numbers Rational Numbers Irrational Numbers Integers (Pos/Neg Whole numbers and 0) Natural Numbers You may even have sets called Positive Whole Numbers and Negative Whole Numbers. For example, 2/3 would belong to sets Real and Rational.
Help please ^^