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Big Ideas Math: Modeling Real Life, Grade 8

BI

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

4. Graphing Linear Equations in Slope-Intercept Form

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Exercise 1 Page 162

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

Slope: 3
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+ b Let'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 = 3x - 7 ⇔ y= 3x+( - 7) We can see that the slope is 3 and the y-intercept is - 7.

Subchapter links

Try It p.162-163

Self-Assessment for Concepts & Skills p.163

Self-Assessment for Problem Solving p.164

Review & Refresh p.165

Concepts, Skills, & Problem Solving p.165-166