# Number Lines and Rational Numbers

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## Number Lines and Rational Numbers Answer Key

1.

Sam plots -(-4) on the number line. What number(s) should he plot?

- 0
- -4
- 4
- -4 and 4

2.

To plot the point -(-8) on the number line, the line would need to be extended more points to the .

- 3, right
- 3, left
- 8, right
- 8, left

3.

If the opposite of 2 was plotted on the number line, which number point(s) would be marked?

- 2
- -2
- -(-2)
- -2 and -(-2)

4.

Camden plots the opposite of -1 on the number line. What number(s) should be marked?

- 0
- 1
- -1
- -1 and 1

5.

Which of the following numbers could be plotted on the number line?

- [math]-(- 29/4)[/math]
- [math]31/5[/math]
- [math]13/2[/math]
- [math]-(- 9/2)[/math]

6.

Plot the number 5 and its opposite on the number line.

- 5 and -5 should be plotted

7.

Plot the number [math]-2[/math] and its opposite on the number line.

- -2 and 2 should be plotted

8.

Graph the following set of numbers on the number line:

{integers less than 4 but greater than or equal to -3}

{integers less than 4 but greater than or equal to -3}

- -3, -2, -1, 0, 1, 2, 3 should be marked

9.

Write the number 0 on the center of the number line. Determine a scale that will allow you to plot 9 and its opposite on the number line. Write the value of each mark and plot the two points.

- Answers may vary. For example:

-15, -12, -9, -6, -3, 0, 3, 6, 9, 12, 15 with 9 and -9 plotted.

10.

Label the marks on the number line using 0.5 as the interval. The number line should range from -2.5 to 2.5.

- Number line should be labeled:

-2.5, -2.0, -1.5, -1.0, -0.5, 0, 0.5, 1.0, 1.5, 2.0, 2.5

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