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Big Ideas Math: Modeling Real Life, Grade 8
BI
Big Ideas Math: Modeling Real Life, Grade 8 View details
2. Slope of a Line
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Exercise 18 Page 153

Substitute the given points into the Slope Formula.

2

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

m=5- 1/-1-( -3)
â–¼
Add and subtract terms
SubNeg

a-(- b)=a+b

m=5-1/-1+3
AddSubTerms

Add and subtract terms

m=4/2
CalcQuot

Calculate quotient

m=2

The slope of the line that passes through the given points is 2.

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arrow_right Try It p.149-150
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Try It 2 (Page 149)
Try It 3 (Page 149)
Try It 4 (Page 149)
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arrow_right Self-Assessment for Concepts & Skills p.150
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Self-Assessment for Concepts & Skills 7 (Page 150)
Self-Assessment for Concepts & Skills 8 (Page 150)
Self-Assessment for Concepts & Skills 9 (Page 150)
arrow_right Self-Assessment for Problem Solving p.151
Self-Assessment for Problem Solving 10 (Page 151)
Self-Assessment for Problem Solving 11 (Page 151)
Self-Assessment for Problem Solving 12 (Page 151)
arrow_right Review & Refresh p.152
Review & Refresh 1 (Page 152)
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Review & Refresh 4 (Page 152)
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