Preclass 2 – Functions

Name: _____________________

1.    Find the domain and range of the relation.

{(5, -3), (-2, 5), (4, 0), (2, 7)}

2.      Find the domain and range of the relation. y = 2x + 7

3.      Find the domain and range of the relation. y = 5

4.      Find the domain and range of the relation. y=2x+7

5. Determine whether a relation is a function.

{(-7, 5), (6, 0), (-2, 7)}

6. Determine whether a relation is a function.

{(7, 5), (6, 0), (7, -100)}

7. Determine whether the relation defines y as a function of x. -4x² = y +5

8. Determine whether the relation defines y as a function of x. -4x = 2y² – 7

9. Determine whether a relation defines y as a function of x. y = -3x +5

10. Given fx=-5x+2.  Find f(-1), f(2), f(u – 1), f(2x+3)

11.    Given fx=x-7x2+3x-10.  Find f(5), and f(2).

12.    Given fx=x-11-7.  Find f(11), f (12), f(13), f(20) and f(2).

13. Understand and use piecewise functions.

a)   fx=4x+3 if
x<0-5x+2
if x≥0

f(-3), f(0), f(2)

b)   fx=3x+1  if x≤2-2x2+3x
if x>2

f(-3), f(0), f(2)

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