Figure 1: Number line from -10 to 10 by ones.
A number line is a line with tick marks and numbers that is used to represent the set of real number. The number line in figure 1 shows all real numbers between -10 and 10. You can use other scales with number lines. The number line in figure 2 uses a scale of 10, meaning that the distance between tick marks represents 10 more.
Figure 2: Number line from -100 to 100 by tens.
The number line in figure 3 uses a scale of 1/10.
Figure 3: Number line from -100 to 100 by tens.
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