Free Algebra Tutorials!
Try the Free Math Solver or Scroll down to Tutorials!

 Depdendent Variable

 Number of equations to solve: 23456789
 Equ. #1:
 Equ. #2:

 Equ. #3:

 Equ. #4:

 Equ. #5:

 Equ. #6:

 Equ. #7:

 Equ. #8:

 Equ. #9:

 Solve for:

 Dependent Variable

 Number of inequalities to solve: 23456789
 Ineq. #1:
 Ineq. #2:

 Ineq. #3:

 Ineq. #4:

 Ineq. #5:

 Ineq. #6:

 Ineq. #7:

 Ineq. #8:

 Ineq. #9:

 Solve for:

 Please use this form if you would like to have this math solver on your website, free of charge. Name: Email: Your Website: Msg:

# The Number Line

We can associate each real number with a point on the number line. The location of 0 on the number line is called the origin.

Each point on the number line corresponds to a real number.

For example, on the following number line the point A corresponds to the real number -3 because point A lies 3 units to the left of 0.

The location of a point on the number line is called its coordinate. The coordinate of point A is -3.

To plot a point means to place a dot at the location of the point on the number line.

Example 1

Plot the following numbers on a number line: 9, -8, -4.5, 0, , 2π

Solution

Find the approximate location of each point and place a dot at that point. Recall that π ≈ 3.14, so 2π 6.28. Also,

Note: The symbol ≈ means "is approximately equal to".