Practice and test of reaching the standard of mathematics all-round training course in the second volume of the eighth grade Chapter 18 contains numbers and their images.

1. If point P(a, b) is in the second quadrant, then point Q(a, -b) is in ().

A. The first quadrant B. The second quadrant

C. The third quadrant D. The fourth quadrant

3. If the image of inverse proportional function y =- passes through point (a, -a), the value of a is ().

4. The image of linear function y = 3x+m- 1 does not pass through the second quadrant, so the value range of m is ().

a . m≤ 1 b . m ≤- 1 c . m > 1d . m < 1

5. The schematic diagram of functions y = kx and y = (k ≠ 0) in the same coordinate system is shown in figure 1, in which the correct one is ().

6. Given the linear function y = kx-2 and y decreases with the increase of x, the inverse proportional function y = ().

A. when x > 0 and y > 0.

B in each quadrant, y decreases with the increase of x.

C. the image is in the first and third quadrants.

D. the image is in the second and fourth quadrants.