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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 33 Page 190

Apply inverse operations to isolate y.

y=x-1/4

Practice makes perfect

Rewriting any linear equation in the slope-intercept form requires us to isolate the y-variable. To do this, we will use the Properties of Equality to apply inverse operations on the equation.

x-y=1/4

LHS+y=RHS+y

x-y+y=1/4+y

Add terms

x=1/4+y

LHS-1/4=RHS-1/4

x-1/4=1/4+y-1/4

Subtract fractions

x-1/4=y

Rearrange equation

y=x-1/4

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