Posted by **Homework Mahde** on Tuesday, February 12, 2013 at 6:22pm.

HI im Homework mahde.Im having trouble with my homework. Do you or anyone know what a interval is? In when your like using Graph or of course math terms. Please anwser quickly! Thankyou.

- math -
**Steve**, Tuesday, February 12, 2013 at 6:30pm
an interval is a section of the number line.

The interval [5,6] is all nmbers between 5 and 6, including the ends. That's a closed interval.

An open interval does not include the ends, and is written with parentheses instead of brackets.

(5,7) is all numbers greater than 5 and less than 7.

An interval may also be half-open, if it includes only one endpoint.

[3,8) is all numbers x such that 3 <= x < 8

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