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Find the distance between the integers on a number line. 9 and -9

2 Answers

6 votes

Answer:

18 units

Explanation:

First, -9 to 0 is 9 units. Next 0 to 9 is also 9 units. Added up, this gives a total of 18 units.

Hope this helps! :)

User Gnanagurus
by
8.2k points
5 votes

Answer:

18

Explanation:

You can do this two ways:

From -9 to 0, the distance is 9 units.

From 0 to 9, the distance is 9 units.

Add the two distances together, and you get 18 units.

You can also do this with the distance formula for a number line.

The distance, d, between numbers a and b on the number line is:

d = |a - b|

Our numbers are -9 and 9. It does not matter which number you call a and which you call b. Since the expression has absolute value in it, the answer will always come out non-negative.

d = |-9 - 9| = |-18| = 18

If you do it the other way, you get:

d = |9 - (-9)| = |9 + 9| = |18| = 18

User CrazyC
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