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Leibniz used the term "function" to describe quantities related to curves, such as coordinates or slopes. Leibniz, in a 1673 letter, wrote about "other kinds of lines which, in a given figure, perform some function".
FUNCTIONS
Key questions
What are functions?
Can we construct and interpret function machines?
What is the inverse of a function?
What are composite functions?
Can we problem solve with functions?
2 lessons

Literacy
stories that set a frame or background
stories that accompany or intertwine
stories that introduce
stories that explain
stories that ask a question
stories that entertain
Introduce...
Develop...
Extend...
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