De kiem tra dai-toan 9

Họ và tên:……………………………..........................................
Lớp 9/2
Kiểm tra một tiết
Môn: Toán (Chương 2 ĐS 9)
Ngày kiểm tra: 03.12.2011
Điểm

Đề
Bài 1: (3 điểm). Cho hàm số bậc nhất y = (m – 2)x +1 (1). Xác định m để:
Đồ thị hàm số (1) song song với đường thẳng y = 2x + 3.
Đồ thị hàm số (1) cắt đường thẳng y = 3x + 2
Hàm số (1) đồng biến trên R
Bài 2. (2 điểm.)Viết phương trình đường thẳng thỏa mãn một trong các điều kiện sau đây.
Song song với đường thẳng y = 2x – 3 và đi qua A(1;2).
Vuông góc với đường thẳng y = -
x + 2 và đi qua B(-2;1)
Bài 3. (4 điểm). a. Vẽ đồ thị hàm số y = x – 1 (d) và y = - 2x +5 (d’) trên cùng một mặt phẳng tọa độ Oxy.
Gọi E là giao điểm của (d) và (d’). Tìm tọa độ của điểm E (bằng phép tính)
Gọi A là giao điểm của (d) với trục tung. B là giao điểm của (d’) với trục tung. Tính chu vi và diện tích của tam giác ABE (Với đơn vị trên các trục tọa độ là cm)
Bài 4. (1 điểm). Tìm m để ba đường thẳng (d): y = x – 5; (d’): y = -2x + 1; (d’’): y= mx + 2 đồng quy tại một điểm trong mặt phẳng tọa độ.
Bài làm
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. MA TRẬN ĐỀ KIỂM TRA 1 TIẾT CHƯƠNG 1. ĐẠI SỐ 9

Chủ đề kiến thức

Nhận biết
Thông hiểu
Vận dụng
TỔNG
Số câu Đ



KQ
TL
KQ
TL
KQ
TL


Hàm số đồng biến nghịch biến
Câu-Bài





B1c
1


Điểm





1
1

Đường thẳng song song cắt nhau
Câu-Bài





B1a,b
B2,B4
5


Điểm





4
5

Vẽ đồ thị hàm số
y = ax+b
Câu-Bài





B 3
3


Điểm





4
4

Tổng







14 10

Ngày kiểm tra 03.12. 2011
GV: Trương Văn Lùng





HƯỚNG DẪN CHẤM ĐỀ KIỂM TRA 1 TIẾT CHƯƠNG 1 ĐẠI SỐ 9
I. Tự luận Đề:
Đáp án
Biểu điểm

Bài 1: a. m = 4
1 điểm

 b. m
2, m
5
1 điểm

 c. m>2
1 điểm

Bài 2: a. y = 2x
1 điểm

 b. y = 2x + 5
1 điểm

Bài 3: a. Vẽ được đồ thị 2 hàm số trên(Mỗi hàm số 1 điểm)
2 điểm

 b. Tính được E (2; 1)
1 điểm

 c. P = 13,3 (cm) S = 6 (cm2)
1 điểm

Bài 4. Tính được A(2;-3), m = -5/2
1 điểm


GHI CHÚ: Mọi cách giải đúng vẫn cho điểm tối đa