Question

1. The value of 4x -2 at x = -1 is
A. -6
B. 2
C. -4
D. 6

2.If x and y are directly proportional, then which of the following is correct? *
A. x+y=constant
B. x-y=constant
C. xy=constant
D. x/y=constant

3.Two quantities x and y are said to be in ————- if an increase in x causes a proportional decrease in y and vice-versa in such a manner that the product of their corresponding values remains constant. *
A. Direct Proportion
B. Inverse Proportion
C. Equal Proportion
D. None of the above

4. Which of the following are in inverse proportion? *
A. The population of a country and the area of land per person.
B. Area of cultivated land and the crop harvested.
C. The time taken for a journey and the distance traveled in a uniform speed.
D. None of the above

5.If x and y are directly proportional then and when x = 13 and y = 39, which of the following is not a possible pair of corresponding values of of x and y *
A. 1 and 3
B. 17 and 51
C. 30 and 10
D. 6 and 18

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Answer 1

Answer:

1. c

2. a

3. b.

4. c

5. d

Explanation:

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Answer 2

Answer:

-6 is the answer 4×-1=-4

-4-2=-6