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Big Ideas Math Integrated I, 2016
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Big Ideas Math Integrated I, 2016 View details
5. Graphing Linear Equations in Slope-Intercept Form
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Exercise 7 Page 141

Can you think of two different ways to find the slope, given a graph?

Description: Horizontal line
Slope: 0

Practice makes perfect

Observing the given graph, we can see that the line passes through the points (-2,-3) and (2,-3). One way to use a graph to find the slope of a line is to count out the change in x and y.

We can see that as the graph travels from left to right, the rise, or change in y, is . Whereas, the run, or change in x, is 4. slope=rise/run ⇔ m=/4=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 ( -2,-3) & ( 2,-3)

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

a-(- b)=a+b

m=-3+3/2+2
AddSubTerms

Add and subtract terms

m=0/4
CalcQuot

Calculate quotient

m=0
A slope of m=0 means that the graph is a horizontal line.
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arrow_right Communicate Your Answer p.135
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arrow_right Monitoring Progress p.136-140
Monitoring Progress 1 (Page 136)
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arrow_right Exercises p.141-144
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