Discussing the test Chapter 1

**Bowling. (2+2+2 points)**Jules goes bowling in the bowling center.

To rent a bowling alley (bowlingbaan) for the afternoon, he will have to pay € 27,50. On top of that Jules will have to pay for drinks. Soft drinks cost € 1,50 per glass.

1 Explain why there is a linear relation between the number of drinks and the total

amount of euro’s Jules has to pay?

There is a linear relation because for each glass of soda Jules pays € 1,50 (each time

the same amount)

2 Write down a formula to calculate the costs *C* in euro's for buying *a* soft drinks.

* C* = 1,50*a* + 27,5

3* Jules got € 40 from his parents to spend at the bowling center.

What is the maximum number of glasses of soft drinks he can buy? *C* = 1,50*a* + 27,5 = 40

1,50*a* = 12,5 *a* = 12,5 : 1,50 = 8,33…. He can buy 8 glasses of soft drink