1. Mice on Two Islands

2. X-ray Island 20,000 mice are on the Island
Population of mice grows 3000 mice every year
How many mice in 1 year? 5 years? 7 years? N years?

3. Tango Island 20,000 mice are on the Island
Population of mice grows 10% every year
How many mice in 1 year? 5 years? 7 years? N years?

4. Proportional Reasoning +Additive Models
A factory builds 500 widgets a week. They want to increase productivity by 25 widgets a week over the next 3 months. What is the factories production rate per week for any given week?
W = P
where P = Production rate
and W = the number of weeks

5. Proportional Reasoning +Multiplicative Models
A factory builds 500 widgets a week. They want to increase productivity by 2.5% widgets a week over the next 3 months. What is the factories production rate per week for any given week?
500∙1.025W = P
where P = Production rate
and W = the number of weeks