When a graphed line is vertical it indicates that the relation:

1. is a function and begins with y =

2. is not a function and begins with x =

3. is a function and begins with x =

4. is not a function and begins with y =

When a graphed line is vertical it indicates that the relation:

1. is a function and begins with y =

2. is not a function and begins with x =

3. is a function and begins with x =

4. is not a function and begins with y =

Answer:y does not depend on x – it is not a functionThat leaves (2) or (4)Since one does not need y in the equation (4) is eliminated(2) is the only possible resultFor example: x = 5