Identify Functions (vertical line test)

Front

What is the vertical line test?

Back

The vertical line test is a method used to determine if a curve is a function. If any vertical line intersects the curve at more than one point, then the curve is not a function.

Front

What defines a function in mathematical terms?

Back

A function is a relation that assigns exactly one output for each input. In other words, for every x-value in the domain, there is one and only one corresponding y-value.

Front

What does it mean if a relation is not a function?

Back

If a relation is not a function, it means that at least one input is associated with multiple outputs. This violates the definition of a function.

Front

Can a vertical line intersect a function more than once?

Back

No, a vertical line cannot intersect a function more than once. If it does, the relation is not a function.

Front

What is the domain of a function?

Back

The domain of a function is the set of all possible input values (x-values) for which the function is defined.

Front

What is the range of a function?

Back

The range of a function is the set of all possible output values (y-values) that the function can produce.

Front

How can you visually determine if a graph represents a function?

Back

You can visually determine if a graph represents a function by using the vertical line test. If any vertical line crosses the graph more than once, it is not a function.

Front

What is an example of a relation that is not a function?

Back

An example of a relation that is not a function is the equation x^2 + y^2 = 1 (a circle), as it has multiple y-values for some x-values.

Front

What is a one-to-one function?

Back

A one-to-one function is a function in which each output is associated with exactly one input. No two different inputs produce the same output.

Front

What is the difference between a function and a relation?

Back

A function is a specific type of relation where each input is associated with exactly one output, while a relation can have multiple outputs for a single input.