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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 26 Page 189

What do m and b represent in the slope-intercept form?

Slope: 0.5
y-intercept: 7

Practice makes perfect

Equations in slope-intercept form follow a specific format, where m represents the slope of the line and b is the y-intercept. y= mx+ bLet's rewrite our equation a little bit so that it more closely resembles this format. This will make it easier to identify the features of the equation.

y-7=0.5x

LHS+7=RHS+7

y-7+7=0.5x+7

Add terms

y=0.5x+7

Below we have highlighted the slope m and y-intercept b. y= 0.5x+ 7 We can see that the slope is 0.5 and the y-intercept is 7.

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