Mathematics Evaluation Quiz

How many kilograms of bottles does the Grade 9 class need to collect in order to raise 50 points?

• 7

• 8

• 9

• 10

What is the value of the constant k in this context?

• 3

• 4

• 5

• 6

If the number of kilograms of bottles increases, the number of points will ______________.

• increase

• decrease

• tripled

• stay the same

Which of the following is an example of a JOINT VARIATION?

• The current varies directly as the electromotive force and inversely as the resistance.

• The kinetic energy of a moving object varies jointly as the mass of the object and the square of the velocity.

• The number of pizza slices varies inversely as the number of persons sharing a whole pizza.

• The time taken to exit the stadium varies directly with the number of spectators and inversely with the number of exits.

How will you translate this problem into a mathematical equation: "The pressure 𝑃 of a gas varies directly as its temperature 𝑡 and inversely as its volume 𝑉"?

• P=tV

• P= tV

• P= ktV

• P= ktV

What is the constant of variation?

• 1

• 2

• 3

• 4

What is the mathematical equation that defines the relation?

• y= x

• y= 3x

• y= 2x

• y= 4x

How do the distance and time of travel affect each other?

• As the distance travelled increases, the length of time decreases.

• As the distance travelled increases, the length of time also increases.

• As the time travelled increases, the distance travelled remain.

• As the time travelled increases, the distance travelled decreases.

What is the relation of two quantities that describes the graph, The distance ( d ) travel?

• directly proportional to time ( t ).

• inversely proportional to time ( t ).

• varies inversely to time ( t ).

• varies jointly to time ( t ).

If x varies directly as y and x = 90 when y = 10, what is the variation constant?

• 9

• 10

• 80

• 90