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Pearson Geometry Common Core, 2011

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Pearson Geometry Common Core, 2011 View details

7. Equations of Lines in the Coordinate Plane

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Exercise 15 Page 194

Substitute the given points into the Slope Formula, m= y_2-y_1x_2-x_1.

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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 In this equation, ( x_1, y_1) and ( x_2, y_2) represent two points on the line. Note that it does not matter which point we use for ( x_1, 1y_1) and which point we use for ( x_2, y_2). The result of using the Slope Formula will be the same.

m=y_2-y_1/x_2-x_1

SubstitutePoints

Substitute ( 5,9) & ( 5,-6)

m=-6- 9/5- 5

Subtract terms

m=-15/0

As we can see, the denominator in our expression for slope is 0. This means the slope is undefined.

Subchapter links

Lesson Check p.193

Practice and Problem-Solving Exercises p.194-196

Standardized Test Prep p.196

Mixed Review p.196