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Big Ideas Math: Modeling Real Life, Grade 8

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

Practice Test

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Exercise 2 Page 192

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

Slope: 3
y-intercept: 9.4

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-1=3x+8.4

LHS+1=RHS+1

y-1+1=3x+8.4+1

Add terms

y=3x+9.4

The given equation is now in the slope-intercept form. Below we have highlighted the slope m and y-intercept b. y= 3x+ 9.4 We can see that the slope is 3 and the y-intercept is 9.4.

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