Alg 2 5.1 (day 2)Graph Quadratic Functions

in Standard Form

Objective: Graph quadratic functions in standard form

and identify key characteristics (F.IF.7a, A.REI.10)

1. Tell whether the function y = -2x2 + 4x + 3 has a minimum value or a maximum value. Then find the minimum or maximum value.

2. Tell whether the function f(x) = x2 + 4x - 9 has a minimum value or a maximum value. Then find the minimum or maximum value.

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3. Cyndie is standing on a platform 24 feet above the pool. She jumps from the platform with an initial upward velocityof 8 feet per second. Her height after t seconds is given by the function

h(t) = -16t2 + 8t + 24.

What is her maximum height above the water?

Assignment:5.1 day 2 worksheet

Alg 2 5.1 Day 2 WS Answers

(3, 2) (0, –2)

x = 0x = 32

–2

3. Max.; –1 4. Min.; 7

5. Min.; –1 6. Max.; 34

7. 20 ft

8. x = –2, x = 3

9. (–2, –5) Min

10. (3, 4) Max

11. B

12. D

SHOW WORK!!!