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Pearson Algebra 2 Common Core, 2011

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Pearson Algebra 2 Common Core, 2011 View details

3. Linear Functions and Slope-Intercept Form

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Exercise 12 Page 78

Substitute the given points into the Slope Formula.

-1/5

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 ( -2,-1) & ( 8,-3)

m=-3-( -1)/8-( -2)

a-(- b)=a+b

m=-3+1/8+2

Add terms

m=-2/10

▼

Simplify

MoveNegNumToFrac

Put minus sign in front of fraction

m=-2/10

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

m=-1/5

The slope of the line that passes through the given points is - 15.

Subchapter links

Lesson Check p.78

Practice and Problem-Solving Exercises p.78-80

Standardized Test Prep p.80

Mixed Review p.80