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RELATIONRELATIONAA Age (years)Weight (kg) 1031 1236 1448 1653 1865 Consider the relationship between the weight of five students and their ages as shown below. Summary Domain Range [Independent variable] [Dependent variable] corresponds to defining relationship

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RELATIONRELATIONAA Relation A relation is a correspondence between a first set, called the domain, and a second set, called the range, such that each member of the domain corresponds to at least one member of the range. Relation A relation is a correspondence between a first set, called the domain, and a second set, called the range, such that each member of the domain corresponds to at least one member of the range.

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FUNCTIONSFUNCTIONSBB Functions are special relations. Every set of ordered pairs is a relation, but every relation is not a function Functions make up a subset of all relations. A function is defined as a relation that is either one to one or many to one., i.e. no ordered pairs have the same first element.

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TYPES OF FUNCTIONS BB

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Surjective Injective Bijective A function is bijective (one-to-one and onto or one-to-one correspondence) if every element of the codomain is mapped to by exactly one element of the domain. (That is, the function is both injective and surjective.)

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NATURAL DOMAIN CC Every relation has a domain, the set of (input) values over which it is defined. If the domain is not stated, by convention we take the domain to be the largest set of (real) numbers for which the expression defining the function can be evaluated. We call this the "natural domain" of the function. Domain Range

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TRANSLATIONSTRANSLATIONSDD Shift upward of downward Shift to the right or left

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TRANSLATIONSTRANSLATIONSDD Reflections

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TRANSLATIONSTRANSLATIONSDD Stretches

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Relations and Functions Another Foundational Concept Copyright © 2014 – Curt Hill.

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