Chapter 8.7
Rate of change
What You'll Learn
Identify rate of change as a ratio comparing two quantities
Calculate unit rates in real-world contexts like speed, wages, and pricing
Convert time units to match required rate units (e.g., minutes to hours)
Apply the distance-time-speed relationship to solve problems
Interpret rate of change as the slope of a linear graph
What You'll Practice
1
Graphing taxi fares with initial costs and per-kilometer rates
2
Calculating earnings based on base salary plus commission per item sold
3
Converting mixed time units to find speed in kilometers per hour
4
Determining cost per person by dividing total expenses among guests
Why This Matters
Rate of change appears everywhere in daily lifefrom calculating your paycheck to planning trip costs to understanding phone data plans. Mastering rates builds your problem-solving skills and prepares you for algebra, physics, and real-world financial decisions.
Before You Start — Make Sure You Can:
This Unit Includes
4 Video lessons
Practice exercises
Skills
Rate of Change
Unit Rate
Slope
Linear Graphs
Word Problems
Distance-Speed-Time
Unit Conversion
