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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 8 Page 192

Use the given points to calculate the slope.

3

An equation in slope-intercept form follows a specific format. y= mx+ b

For an equation in this form, m is the slope and b is the y-intercept. We will start by looking at the given table.

x	y
- 1	- 4
0	- 1
1	2
2	5

Let's now substitute the last two points given in the table, (1,2) and (2,5), into the Slope Formula and calculate m.

m = y_2-y_1/x_2-x_1

SubstitutePoints

Substitute ( 1,2) & ( 2,5)

m=5- 2/2- 1

▼

Simplify right-hand side

Subtract terms

m=3/1

a/1=a

m=3

We found that the slope is 3.

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