IS IT A FUNCTION?

Front

What is a function?

Back

A function is a relation where each input (x-value) has exactly one output (y-value).

Front

What does it mean if a set of ordered pairs is not a function?

Back

It means that at least one input (x-value) is associated with more than one output (y-value).

Front

How can you determine if a set of ordered pairs is a function?

Back

Check if any x-value repeats; if it does, it's not a function.

Front

What is the vertical line test?

Back

A method to determine if a graph represents a function; if a vertical line intersects the graph at more than one point, it is not a function.

Front

Is the set {(1, 2), (2, 3), (1, 4)} a function?

Back

Not a Function (the x-value 1 has two different y-values: 2 and 4).

Front

Is the table with x-values {1, 2, 3} and y-values {4, 5, 6} a function?

Back

Function (each x-value is unique).

Front

Is the graph of y = x^2 a function?

Back

Function (each x-value has one corresponding y-value).

Front

Is the graph of y = √x a function?

Back

Function (each x-value has one corresponding y-value).

Front

Is the graph of y = ±√x a function?

Back

Not a Function (each x-value has two corresponding y-values).

Front

What is an example of a function in real life?

Back

A vending machine: each button (input) gives one specific snack (output).