Direct Variation and Inverse Variation

1. A variation wherein an increase in one quantity is also an increase in the second quantity.

• direct

• inverse

• joint

• combined

2. If x varies inversely as y and x = 10 when y = 2. y = ____ when x = 20.

3. What type of variation is illustrated in the graph above?

• direct

• inverse

• joint

• combined

m varies directly as the square of n. if m = 12 when n = 2, find the constant of variation k.

• 1

• 2

• 3

• 4

What variation is represented by the graph above?

• combined

• direct

• inverse

• joint

In an inverse variation, if one quantity increases, the other quantity ______________.

Which of the following situations illustrates a direct variation?

• The number of days to the number of men working to complete a job

• The number of pizza slices to the number of persons sharing a whole pizza

• The speed of a car to the time of travel

• The fare of a passenger to the distance he travels

Mang Marcel works as a janitor at PNHS. For three days of work he earns P1,350. How much would he be receiving if he works for 16 days.

• P7,000

• P7,100

• P7,200

• P7,300

Given the table of values, determine the equation/s illustrating the relation between the two variables x and y.

• y =x/5

• x = 5y

• its either the first equation or second equation

• all of the above

The cost C of fish varies directly as its weight w in kilograms. Which of the following is the mathematical statement illustrating the given situation.

• w = Ck

• C = k/w

• w = k/C

• C = kw