Module 3 — Business and Lines
Use this if cost, revenue, profit, slope, or model units are mixing together.
Cost, revenue, and profit have different jobs: C is production cost, R is price times quantity, and P is revenue minus cost.
Identify whether x counts items, thousands of units, or another quantity before interpreting a slope.
In an applied linear model, slope represents a constant change in the output per one-unit increase in the input.
In a linear cost model, what does the slope represent?
The marginal change in cost for a one-unit increase in quantity.
Got it now? Scroll back up and re-read the section — it should land differently.
Counts and mappings come from .ai/students/alaina/math1330/assignments/index.json. These are task maps, not answer keys.
| WebAssign set | Questions | Textbook sections |
|---|---|---|
| 1330 W - Bus Models | 49 | §1.2, §1.3 |
| 1330 W - Linear | 20 | §1.2, §1.3 |
Build cost, revenue, and profit models.
Interpret demand and supply models.
Recognize linear functions from tables and graphs.
Find a linear equation from data.
Interpret fixed cost, marginal change, slope, and intercepts in an applied model.
Use linear models and choose appropriate independent and dependent variables.
