World Traveler -- Currency Conversion - 21st Century Math Project

Grade Levels
7th - 12th
Formats Included
  • PDF (13 pages)
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Take your class on a trip with functions. In this 21st Century Math Project, international travel and currency conversion provide the hook to teach defining basic functions and finding inverses. Using exchange rates, students will practice converting into currencies they may never have heard of before. While the assignments is mathematically driven, it gives students the opportunity to learn a little about other countries of the world.

In this 15 page PDF, you will be given a mapping to the Content Standards, an outline for how to implement the project, 2 practice assignments and 1 project. A grand voyage that takes them around the world. An answer key is included.

-- In “Money Changers”, students will use functions to exchange currency and construct inverses to undo it. They will also complete an exchange rate table of values.

-- In “World Traveler”, students will track the spending of a tourist on vacation and remain conscious of a budget.

-- In “World’s Fair”, students represent different countries and offer different goods. They must research to find the price of 5 goods in their country. They must also write a function to convert currency from US Dollars to the currency in their country and an inverse to change it back.

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Total Pages
13 pages
Answer Key
Teaching Duration
3 days
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to see state-specific standards (only available in the US).
Solve an equation of the form 𝘧(𝘹) = 𝘤 for a simple function 𝘧 that has an inverse and write an expression for the inverse. For example, 𝘧(𝘹) =2 𝘹³ or 𝘧(𝘹) = (𝘹+1)/(𝘹–1) for 𝘹 ≠ 1.
Find inverse functions.
For a function that models a relationship between two quantities, interpret key features of graphs and tables in terms of the quantities, and sketch graphs showing key features given a verbal description of the relationship.
Use function notation, evaluate functions for inputs in their domains, and interpret statements that use function notation in terms of a context.
Understand that a function from one set (called the domain) to another set (called the range) assigns to each element of the domain exactly one element of the range. If 𝘧 is a function and 𝘹 is an element of its domain, then 𝘧(𝘹) denotes the output of 𝘧 corresponding to the input 𝘹. The graph of 𝘧 is the graph of the equation 𝘺 = 𝘧(𝘹).


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