What you’ll learn
Write the proportional linear equation with this slope through the origin.
Key idea
A proportional linear relationship has zero intercept and form y=mx.
Worked example
Write the proportional linear equation with this slope through the origin.
m = 3, through (0, 0)
- y = 3x
Answer: y = 3x
Quick Check
Analyze the proposed student response. Choose Correct or Incorrect.
x/y table Student response: Not proportional
| x | y |
|---|---|
| 0 | -6 |
| 2 | -10 |
| 4 | -14 |
| 6 | -18 |