Lesson 8-‐1 HW Answers Pg. 417/ #1 – 6 1.
x
y
−2
−2
2.
1 −_ 2 0
−1 0
1 −_ 2 −2
1 2
x
y
−2
8
−1
2
0
0
1
2
2
8 y
y
8
4
6
2
4
x -4
-2
0
2
2
4
-2 -4
x -8
-4
-2 -4 -6 -8
3. downward, a = −3, a < 0 4. upward, a = 5, a > 0 5. a. y = -x2; b. maximum: 0; c. D: all real numbers; R: y ≤ 0 6. a. y = x2; b. minimum: 0; c. D: all real numbers; R: y ≥ 0
2
4
6
8