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.

Big Ideas Math Geometry, 2014

BI

Big Ideas Math Geometry, 2014 View details

Maintaining Mathematical Proficiency

Continue to next subchapter

Exercise 3 Page 123

What slope does a horizontal line have?

0

Practice makes perfect

Observing the given graph, we can see that the line is horizontal.

All horizontal lines have a slope of 0. We can confirm this answer by using the other method, the Slope Formula. m = y_2-y_1/x_2-x_1 We will use the given points to solve for the slope.

m = y_2-y_1/x_2-x_1

SubstitutePoints

Substitute ( - 3,- 2) & ( 1,- 2)

m=- 2-( - 2)/1-( - 3)

a-(- b)=a+b

m=- 2+2/1+3

Add terms

m=0/4

Calculate quotient

m=0

A slope of m=0 means that there is no vertical change between any two points.

Subchapter links

Exercises p.123