1. Multiple choice question: 40 points.

1. In the plane rectangular coordinate system, the point must be in ().

A, the first quadrant b, the second quadrant c, the third quadrant d and the fourth quadrant

2. Original volume

3. Original volume

4. When M (1, -2) and N(-3, -2) are known, the positional relationship between the straight line MN and the X axis and the Y axis is () respectively.

A. cross, cross B. parallel, parallel C. vertical cross, parallel D. parallel, vertical cross

5. Original volume

6.△DEF is translated by △ABC, and the point corresponding to point A (-1, -4) is D( 1,-1), then the point corresponding to point B (1, 1) is E and C (-/).

A(2，2)，(3，4) B(3，4)，( 1，7) C(-2，2)，( 1，7) D(3，4)，(2，-2)

7. In the following curve, the function that y is not x is ().

8. Chapter IV of the original volume 15

9. It is known that the area of a circle is S and the radius is R. The following statement is true ().

A: s is an independent variable, R is a dependent variable, and S is a function of R. B: s is a dependent variable, R is an independent variable, and R is a function of S.

C: s is an independent variable, R is a dependent variable and R is a function of S. D: s is a dependent variable, R is an independent variable and S is a function of R.

10. On Father's Day, a classmate's poem recalling his father was published in the "Wen Yuan" column of the school: "Let's leave home and go to the station, don't get married.

If you say a thousand words, the students will rest assured and the old father will come back with hope. "If the vertical axis represents the distance between father and students when traveling, and the horizontal axis T represents the departure time, then the image of kissing the above poems is ().

2. Fill in the blanks by 30 points

1 1. Class 7 (3) has seven rows and eight columns, and Zhang Yan's seat is in two rows and four columns, abbreviated as (2,4). The class seat table says Wang Gang (5,8), so Wang Gang's seat is in;

12. Original Volume

13. Original Volume

14. Original Volume

15. The original volume 15 Chapter I Problems 17

16. The original volume 15, chapter 13.

Three. solve problems

17. The original volume 19 (8 points)

18. Represent the following points in the plane rectangular coordinate system as shown in the figure: a (0 0,3); B( 1，-3)； C(3，-5)；

D(-3，-5)； E(3，5)； f(5.7)； G(5，0)

The distance from point (1)A to origin o is.

(2) Translate point C to the negative direction of the axis by 6 units, which coincides with the point.

(3) What is the relationship between connecting CE, straight CE and axis?

(4) What is the distance between point F and the axis? (12)

19. It is known that the image of the linear function y=kx+b passes through two points A (2,3) and B (0,2) and intersects the X axis at point C (8).

(1) Find the relation of this linear function;

(2) Find the area of triangle AOC.

20. Judge whether the following propositions are true or false; If they are wrong, give a counterexample. (8 points)

(1) If two angles are not antipodal angles, they are not equal;

(2) If ab=0, then A+B = 0.

2 1. The picture shows the relationship between the distance and time of students' travel during the May Day spring outing in the seventh grade of Red Star School. Please answer the following questions according to the chart:

(1) When do students get off and visit the first scenic spot? How long will the tour take?

(2) 1 1:30 How far is the bus from the school?

(3) When do students return to school, and what is the average speed of the car when they return to school? (12)

22. It is known that E is a point outside AB and CD, ∠D=∠B+∠E, and verification: AB ∠ CD. (10)

23. The company has 12 agricultural vehicles and 6 agricultural vehicles in warehouse A and warehouse B respectively, and now it needs to transfer 10 agricultural vehicles to county A and 8 agricultural vehicles to county B. It is known that the freight for transporting an agricultural vehicle from warehouse A to county A and county B is 40 yuan and 80 yuan respectively. The freight charges for transporting an agricultural vehicle from warehouse B to counties A and B are 30 yuan and 50 yuan respectively.

(1) Assuming that X agricultural vehicles are transported from warehouse B to county A, find the functional relationship between total freight Y and X;

(2) If the total freight does not exceed 900 yuan, how many transportation schemes are there?

(3) Find the transportation scheme with the lowest total freight. What's the lowest freight? (12)