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.

Envision Math 2.0: Grade 8, Volume 1

EM

Envision Math 2.0: Grade 8, Volume 1 View details

Get Ready!

Continue to next subchapter

Exercise 11 Page 209

Substitute the given points into the Slope Formula.

3/4

Practice makes perfect

We can calculate the slope by substituting the given points into the Slope Formula. m = y_2-y_1/x_2-x_1 Note that it does not matter which point we choose to use for ( x_1, y_1) and ( x_2, y_2), since the result of using the Slope Formula will be the same.

m=y_2-y_1/x_2-x_1

SubstitutePoints

Substitute ( 5,- 1) & ( - 3, - 7)

m=- 7-( - 1)/- 3- 5

▼

Add and subtract terms

a-(- b)=a+b

m=- 7 + 1/- 3 - 5

Add and subtract terms

m=- 6/- 8

▼

Simplify right-hand side

- a/- b=a/b

m=6/8

a/b=.a /2./.b /2.

m=3/4

The slope of the line that passes through the given points is 34.

Subchapter links

Review What You Know! p.209