# Function Machines with 'Bubble Function'

**CURRICULUM AREAS COVERED**

Ages 9-15

Function Machines incorporating:

- add, multiply, divide or subtract by 2
- multiply by 1 or -1, 2 or -2
- powers of 1 and 0
- standard form

**HOW TO PLAY**

In this game, use the function machine to produce the output you need. Use the output to match at least 3 numbered bubbles of the same value.

- Take a look at the function machine and see if the output matches any of the existing bubbles in the garden.
- If it does, then click on the location in the garden where you want to position your output bubble.
- If your output bubble matches a cluster of 3 or more bubbles of the same value, then the cluster of bubbles will pop.
- Use the function switch to change the function, to produce an output that matches other bubbles in the field.

**SCORING INFORMATION**

For each level of this game, complete the relevant level and beat the Target Score to earn a medal (**B**ronze, **S**ilver, **G**old).

**Complete level >>**Target Score >>> 250-499 (**B**), 500-999 (**S**), 1000+ (**G**)

**Scoring calculation**

**The Efficiency Bonus**

- Players will get a bonus for playing efficiently. Meaning the least number of shots needed to complete the game, the better.
- The efficiency is calculated as
- There are 3 bands of Efficiency Bonus
- As an example, Number of starting bubbles are 4, and it took 7 shots to clear. The Efficiency in this case is 7/4 = 1.75. This is awarded an Efficiency Bonus of 500 points.

**BASIC STRATEGIES**

- Target bubble clusters that already have two bubbles joined
- Check the 'next input' to ensure that you're not blocking access to existing clusters
- Join two clusters together to pop more than 3 bubbles in 1 shot