1. In the Mystery Fruit Machine, if the rule is "multiply by 2", what do you get when you put in the number 4?

6 8 2 16

2. A mapping has the rule x maps to x + 5. What is the output when the input is 7?

12 35 2 75

3. The rule of a mapping is x maps to 2x - 1. What number does x = 3 map to?

5 6 7 4

4. A mapping x to y gives the pairs (1, 3), (2, 5), (3, 7), (4, 9). What is the rule?

y = 2x + 1 y = x + 2 y = 3x y = 2x - 1

5. In the mapping x maps to x squared, the set of input values {1, 2, 3} is called the ______.

Range Domain Rule Co-domain

6. If the rule is x maps to x + 3 and the domain is {2, 4, 6}, what is the range?

{5, 7, 9} {6, 12, 18} {2, 4, 6} {1, 3, 5}

7. In an arrow diagram, an arrow drawn from 5 to 20 could represent which rule?

Multiply by 4 Add 4 Subtract 4 Divide by 4

8. A trotro fare function machine doubles the number of passengers, then adds 2 for the driver and mate. If 6 passengers enter, what is the output?

12 14 8 16

9. The rule of a mapping is x maps to 3x - 2. What is the image of 5 under this rule?

13 17 15 10

10. A mapping x to y gives the pairs (1, 6), (2, 4), (3, 2), (4, 0). Find the rule.

y = -2x + 8 y = 2x + 4 y = -x + 7 y = x + 5