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Graphs of Constant, Linear, and Quadratic Functions

Answers to Self Test

1. There are no real zeros. This is a constant function. Its graph is a horizontal line through (0 , 5).

2. One zero at x = - 3. This is a first degree or linear function. One other point (0 , 6).

3. One zero at x = - This is a first degree or linear function. One other point (0 , 5).

4. One zero at x = - 4 and another at x = 1. This is a quadratic function. One other point (mid way between zeros) is (- , - ).

5. One zero at x = 3 and this is a double root. This is a quadratic function. One other point is (0 , - ).

6. One zero at x = - 2 and another at x = 2. This is a quadratic function. One other point (mid way between zeros) is (0 , - 12).

7. One zero at x = - 5 and another at x = - 1. This is a quadratic function. One other point (mid way between zeros) is (- 3 , - 4).

8. One zero at x = - and another at x = . This is a quadratic function. One other point (mid way between zeros) is ( , - 4).