1. Math 1 Warm Up Evaluate y= 2x + 5 for x = 4

2. Questions?

3. Evaluating Functions
Objective: To learn to evaluate functions from given domain values.
function rule – is an equation that describes a function. An “input ⟶ output” machine

4. Function Rule & Function Notation

5. Example 1
Evaluate f(x) = -5x + 25 for x = -2

6. Example 2
Evaluate g(x) = 2 𝟒𝒙 −𝟕 for x = -5

7. Example 3
Evaluate h(x) = 4x² − 2x for x = -3

8. Example 4
Evaluate h(t) = -3t³ + 2t² – 4t for t = -3

9. Example 5

10. Writing Function Rulesx Y 1 5 2 6 3 7 4 8
Look for a pattern: Ask yourself “what can I do to X to get Y?”
F(x) = x + ?

11. x Y 1 3 9 6 36 81 x Y 1 2 4 3 6 8

12. x Y 1 2 8 3 27 x Y -2 -8 -1 -4 1 4

13. x Y -8 64 -4 16 4 x Y 1
0.5 2 3
1.5 4

14. Assignment
In the textbook… pp
#15-22, 32, 34-37, 41, 42