body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

McGraw Hill Integrated I, 2012

MH

McGraw Hill Integrated I, 2012 View details

3. Distance and Midpoints

Continue to next subchapter

Exercise 1 Page 586

How do you find the distance on a number line?

$8$

Practice makes perfect

To find the measure of $\overline{X Y},$ we need to consider only the coordinates of $X$ and $Y .$ Let's look at the given number line.

According to the Distance Formula on a Number Line, the distance between two points is the absolute value of the difference of their coordinates.

X Y = ∣ a - b ∣

$a = 7$ , $b = - 1$

X Y = ∣ 7 - (- 1) ∣

$a - (- b) = a + b$

X Y = ∣ 7 + 1 ∣

Add terms

X Y = ∣ 8 ∣

$∣ 8 ∣ = 8$

X Y = 8

We found that

X Y

is

8 .

Subchapter links

Check Your Understanding p.586-587

Practice and Problem Solving p.587-590

H.O.T. Problems p.590

Standardized Test Practice p.591

Spiral Review p.591

Skills Review p.591