185 - Formative 4.A Review 2021

Front

What is a function?

Back

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

Front

Which ordered pair can be added to the following points to create a function? (3, 5), (4, 9), (2, 5)

Back

(1, 9) is the ordered pair that can be added to create a function.

Front

What is the domain of the following points: (3, 5), (4, 9), (2, 5)?

Back

The domain is the set of all x-values: D = {3, 4, 2}.

Front

Is the relation {(11, 2), (11, 3)} a function? Why?

Back

No, because the x-value 11 has two different y-values (2 and 3) associated with it.

Front

Which set of values represents a function? (9,5), (10,5), (9,-5), (10,-5) or (6,-5), (7,-3), (8,-1), (9,1)?

Back

(6,-5), (7,-3), (8,-1), (9,1) is a function because each x-value is unique.

Front

What is the range of a function?

Back

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

Front

If a function has the points (1, 2), (2, 3), (3, 4), what is the output when the input is 2?

Back

The output is 3.

Front

What does it mean for a relation to be one-to-one?

Back

A one-to-one relation means that each input has a unique output, and no two inputs share the same output.

Front

How can you determine if a graph represents a function?

Back

Use the vertical line test: if a vertical line intersects the graph at more than one point, it is not a function.

Front

What is an example of a non-function relation?

Back

The relation {(1, 2), (1, 3)} is not a function because the input 1 has two different outputs.