NUMBER LINES

 

What are NUMBER LINES?

 

A NUMBER LINE is a line that goes

 

on forever, a NUMBER LINE may

 

 have two sides, one for negative

 

numbers and one for positive

 

numbers. Also a NUMBER LINE

 

does not have to have a zero.

 

 

  

 

 

WHAT DOES A NUMBERLINE NEED?

 

 

•     A line with two arrows at the end

 

•        The numbers that you need

 

•         Something useful to count by

 

•         An even space in between the numbers

 

 

 

 

This number line right here on the left side

 

 

has something useful to count by and as you can see the spaces are

 

 

 

also even.

 

 

 

In some cases a number line could have a line going straight accross

 

 

 

 and a line going up and down. Also, remember that a number line

 

 

 

does not need a zero. If you are graphing positive and negative

 

 

 

numbers do not insert a zero if you don't need it.

 

 

 

 

 

Graphing inequalities have to do with graphs too. If the sign of the

 

 

 

inequality is greater than or equal to, you would put a closed dot on

 

 

 

the number line and point to the right side with an arrow.

 

 

 

Like this:

 

 

 

 

If you graph an inequality that reads that a number is less than zero

 

 

 

your number line would look like this:

 

 

 

 

 

 

 If you want to see more examples you can check these out:

 

 

www.amblesideprimary.com/ambleweb/mentalmaths/numberlines.html - 2k -

www.funbrain.com/linejump/index.html - 6k -

 

 

Inequalities