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Precalculus: Functions

Problems

Functions

Types of Functions

Problem : Decide whether the graph below is a function.

Yes.

Problem : Decide whether the graph below is a function.

No.

Problem : Decide whether the graph below is a function.

No

Problem : What is the domain and range of the function f (x) = ?

Domain D : positive real numbers, range R : positive real numbers.

Problem : What is the domain and range of the function f (x) = ?

Domain D : real numbers ≠2 . Range R : real numbers.

Problem : Is the following a function: y = ±x ?

No.

Problem : Is the following a function: y = | x| ?

Yes.

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