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Big Ideas Math: Modeling Real Life, Grade 8

BI

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

Chapter Review

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Exercise 47 Page 191

Everything necessary to use point-slope form has been given in the problem.

y+8=- 2/3(x-2)

Practice makes perfect

An equation in point-slope form follows a specific format. y- y_1= m(x- x_1) In this format, m represents the slope and the point ( x_1, y_1) lies on the graph of the line. We are given the point ( 2, - 8) and the slope - 23, so we have everything we need to create a point-slope form equation.

y-y_1=m(x-x_1)

SubstituteValues

Substitute values

y-( - 8)= -2/3(x- 2)

a-(- b)=a+b

y+8=-2/3(x-2)

Subchapter links

1 Graphing Linear Equations p.187

2 Slope of a Line p.188

3 Graphing Proportional Relationships p.188-189

4 Graphing Linear Equations in Slope-Intercept Form p.189

5 Graphing Linear Equations in Standard Form p.190

6 Writing Equations in Slope-Intercept Form p.190-191

7 Writing Equations in Point-Slope Form p.191