Rates and Average
Rates and Average is a skill on Pengi from Lesson 7: Rates and Average and Measures of Central Tendency in Saxon Math, Course 3.
Key Concepts
Property A rate is a division relationship between two measures, often expressed as a unit rate like miles per hour. You can use rates to find a total amount, or use total amounts to find the rate itself.
Examples Heather biked 100 km in 4 hours. Her average speed was $\frac{100 \text{ km}}{4 \text{ hr}} = 25$ kilometers per hour. Driving for 6 hours at an average speed of 55 mph, the total distance is $6 \text{ hours} \times 55 \text{ mph} = 330$ miles.
Explanation Rates make comparing things a snap by boiling them down to a "per one" basis. To find a rate, like average speed, you simply divide the total distance by the total time. This trick works for prices, speeds, and so much more, helping you become a savvy problem solver!
Common Questions
What is Rates and Average?
Rates and Average is a skill on Pengi from Lesson 7: Rates and Average and Measures of Central Tendency in Saxon Math, Course 3.
What grade level is Rates and Average for?
Rates and Average is part of the Grade 8 Math curriculum, covered in Saxon Math, Course 3. It is designed for students studying Math at the Grade 8 level.
How can I learn Rates and Average?
Pengi offers an AI-guided lesson for Rates and Average that walks you through the key concepts step by step. The lesson is aligned to Saxon Math, Course 3 so the content matches what you see in class.
How do I practice Rates and Average?
After learning the concept, use the Practice mode to work through targeted exercises on Rates and Average. The AI adapts to your level and gives feedback on each answer so you can identify and fix mistakes.
Which textbook covers Rates and Average?
Rates and Average is covered in Saxon Math, Course 3, specifically in Chapter 1: Number & Operations • Measurement under Lesson 7: Rates and Average and Measures of Central Tendency. Pengi's lesson is aligned directly to this textbook so you can follow along with your class.
Is Rates and Average free to study on Pengi?
Yes, the core Learn and Practice modes for Rates and Average are available for free on Pengi. No credit card is required to start studying.