Verified answer

Answers:

Practice Exercises 1:

1. Function
2. Function

Practice Exercises 2:

1. Not Function
2. Function
3. Not Function

Practice Exercises 3:

• Function
• Not Function
• Function
• Not Function
• Not Function
• Not Function

Explanations:

Practice Exercises 1:

1. One-to-One relation; therefore, a function.
2. One-to-One relation; therefore, a function.

Practice Exercises 2:

1. The value of x, which is 0 has been used twice or mapped to more than one element in the range, values of y.
2. The relation is a linear function.
3. The graph of this relation is a circle; therefore, it is not a function.

Practice Exercises 3:

✓Using the Vertical Line Test, we can easily tell whether the graph of the relation is a function or not. Remember that a function consists of coordinates in which the value of x can't be used more than once.

-