
Mark M. answered 08/23/17
Tutor
5.0
(278)
Mathematics Teacher - NCLB Highly Qualified
Look at a ruler. It is a number line!
See how the numbers are in order?
Now a number line has numbers getting bigger to the right.
Hold the rule so that 1 is at the left.
The numbers get bigger to the right.
It is the same with a number line.