Page 106 - Math Course 3 (Book 1)

The Slope-Intercept Form

Real World Example

Describe what the y-intercept and the slope represent.

A. y-intercept 150 represents number of shirts sold; slope 12 represents cost of materials.
B. y-intercept –150 represents cost of materials; slope 12 represents dollars earned per shirt.
C. y-intercept 150 represents dollars earned; slope 12 represents cost per shirt.
D. y-intercept –150 represents cost of materials; slope 12 represents number of shirts sold.

Answer

Skill Practice!

State the slope and the y-intercept for the graph of each equation.
1
1. y = 12x – 4 2. y = x + 3 3. 3x – y = 6
4

Given the slope and y-intercept, graph each line.
1 2
4. slope = –2 5. slope = 2 6. slope = 3
y-intercept = 2 y-intercept = 4 y-intercept = –3

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