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Big Ideas Math: Modeling Real Life, Grade 8

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Big Ideas Math: Modeling Real Life, Grade 8 View details

2. Slope of a Line

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Exercise 3 Page 149

Substitute the given points into the Slope Formula.

There is no answer for this exercise

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 ( 1,-2) & ( 7,-2)

m=-2-( -2)/7- 1

a-(- b)=a+b

m=-2+2/7-1

Add and subtract terms

m=0/6

0/a=0

m=0

The slope of the line that passes through the given points is 0. This means that this line is horizontal.

Subchapter links

Try It p.149-150

Self-Assessment for Concepts & Skills p.150

Self-Assessment for Problem Solving p.151

Review & Refresh p.152

Concepts, Skills, & Problem Solving p.152-154