MATHEMATICS 8: MOCK EXAM 2ND GRADING

1. It involves a relation of two quantities, x and y, where in, as x increases y decreases, or when y increases x decreases and that their product remains constant.

• Direct Variation
• Inverse Variation
• Joint Variation

2. It is a relationship between two quantities, x and y, where, as x increases y also increases or as y decreases, x also decreases and the ratio between them is constant or the same for all given values of the variables. S

• Direct Variation
• Inverse Variation
• Joint Variation

3. It is a type of variation in which one variable varies directly to the product of two or more variables

• Direct Variation
• Inverse Variation
• Joint Variation

4. The time (t) required to perform the given amount of work to the number of persons (p) working shows direct variation.

• True
• False

5. The circumference (C) of a circle to its diameter (d) shows direct variation.

• True
• False

6. The commission (C) of a salesman varies directly to the amount of his sales (S). What kind of variation is the given example?

• Direct Variation
• Inverse Variation
• Joint Variation

7. If y varies directly as x, how is y change if x is increased by 15%

• Therefore, y also increased by 15 %
• Therefore, y decreased by 15 %
• Therefore, y increased by 10 %

8. What is the variation in getting the amount of interest if Interest = Prt.

• Direct Variation
• Joint Variation
• Combined Variation

9. What is the variation in getting the speed (r) of the car to the distance (d) traveled and time of travel (t) if r = 𝑑 /t

• Inverse Variation
• Joint Variation
• Combined Variation

10. When direct and inverse variations happen at the same time.

• Inverse Variation
• Joint Variation
• Combined Variation