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Big Ideas Math: Modeling Real Life, Grade 8

BI

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

4. Choosing a Data Display

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Exercise 5 Page 260

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

Slope: - 1
y-intercept: 8

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 - 8 = - x

LHS+8=RHS+8

y = - x + 8

Below we have highlighted the slope m and y-intercept b. y = - x + 8 ⇔ y= - 1x+ 8 We can see that the slope is - 1 and the y-intercept is 8.

Subchapter links

Try It p.256-258

Self-Assessment for Concepts & Skills p.258

Self-Assessment for Problem Solving p.259

Review & Refresh p.260

Concepts, Skills, & Problem Solving p.260-262