| |
| |
1. |
What are the real roots of the quadratic equation whose related function is graphed below? |
| |
|
 |
| |
|
A. |
-2 |
B. |
-4 |
| |
|
C. |
4 |
D. |
-4, 4 |
| |
|
Hint |
|
| |
2. |
Solve x2 – 6x + 5 = 0 by graphing. |
| |
|
A. |
-1 |
B. |
5 |
| |
|
C. |
1 |
D. |
1, 5 |
| |
|
Hint |
|
| |
3. |
Solve x2 + 4x + 4 = 0 by graphing. |
| |
|
A. |
-4, 4 |
B. |
4 |
| |
|
C. |
-2, 2 |
D. |
-2 |
| |
|
Hint |
|
| |
4. |
Solve a2 + 16 = 0 by graphing. |
| |
|
A. |
 |
B. |
-4 |
| |
|
C. |
-4, 4 |
D. |
4 |
| |
|
Hint |
|
| |
5. |
In baseball, a pop fly should be easily caught if it stays in the air for 7 seconds. Suppose a ball that is hit can be represented by the function y = –16t2 + 125t + 5, where y is the height after t seconds. Will the ball be considered an easy catch? |
| |
|
A. |
yes, because t > 7 |
B. |
no, because t > 7 |
| |
|
C. |
no, because t < 7 |
D. |
yes, because t < 7 |
| |
|
Hint |
|
|
|