Function or Not?

Front

What is the definition of a function?

Back

A function is a relation where every input has only ONE output.

Front

Is the relation a function? Why? (x-values: 11, y-values: 2 and 3)

Back

No, because the x-value 11 has two y-values paired with it.

Front

Is the relation a function? Why? (x-values: 11, y-values: 2 and 3)

Back

No, because the x-value 11 has two y-values paired with it.

Front

Which set of values is a function? (9,5) (10,5) (9,-5) (10,-5)

Back

Not a function.

Front

Which set of values is a function? (3,4) (4,-3) (7,4) (3,8)

Back

Not a function.

Front

Which set of values is a function? (6,-5) (7,-3) (8,-1) (9,1)

Back

This is a function.

Front

Which set of values is a function? (2,-2) (5,9) (5,-7) (1,4)

Back

Not a function.

Front

Look at the graph. Is the relation a function? (Graph shows a vertical line)

Back

No.

Front

What is the vertical line test?

Back

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

Front

What is an input in a function?

Back

An input is a value that is fed into a function to produce an output.