PISA MATH QUIZ

Which of the following statements is true about a function?

• It can have multiple outputs for the same input.

• It cannot have any outputs for a given input.

• It must have exactly one output for each input.

• It can have different outputs for the same input depending on the day of the week.

  
  

Which of the following relations is symmetric?

• A) ({(1, 1), (2, 2), (3, 3)}}

• B) ({(1, 2), (2, 1), (1, 1)}}

• C) ({(1, 1), (2, 2), (1, 2)}}

• D) ({(1, 1), (2, 2), (1, 2), (2, 1)}}

Melanie is going shopping for clothes. She has a PHP 500 gift card, and she plans to spend an additional PHP 300 for each item of clothing she buys. Write the linear equation that describes her total spending (y) based on the number of items of clothing she purchases (x).

• y = 300x + 500

• y = 500x + 300

• y = x + 800

• y = 800x

Ben is subscribed to a monthly phone bill that includes a fixed fee of PHP 200 plus an additional charge of PHP 10 per minute for calls. If his monthly bill is PHP 400, how many minutes of calls did he make that month?

• 10 minutes

• 20 minutes

• 30 minutes

• 40 minutes

A bridge is arch-shaped and its height y, in meters, at various distances x, in meters, from its center can be modeled by the quadratic equation y = -0.005x² + 1.25. What does this model represent?

• The speed of a boat under the bridge

• The height of the arch at different points

• The depth of the water under the bridge

• The length of the bridge

The height \(y\) in meters of water sprayed from a fountain at a distance \(x\) meters from the nozzle can be modeled by \(y = -0.2x^2 + 2x + 0.5\). What does this model represent?

• The depth of the water

• The height of the water at different distances

• The speed of the water flow

• The width of the fountain

What is the vertical line test used to determine?

• Whether a relation is a function

• Whether a function is linear

• Whether two functions are equal

• Whether a relation is symmetric

What type of relation is characterized by the property that every element is related to itself?

• Symmetric relation

• Reflexive relation

• One-to-one relation

• Function

Sarah wants to buy a smartphone, which is currently on sale for 20% off. The original price of the smartphone is PHP 8000. How much is the discounted price of the smartphone?

• PHP 8000

• PHP 6400

• PHP 8000

• PHP 2500

Mark works as a delivery driver and earns PHP 12 for every delivery he makes. If he makes at least 20 deliveries in a day, he gets an extra PHP 3 for each additional delivery. If Mark makes 25 deliveries in a day, how much did he earns?

• PHP 240

• PHP 215

• PHP 315

• PHP 255