Answer:
C is a function... all the others are not functions since it doesn't pass the line test.
Step-by-step explanation:
0.17 is greater because 0.170 the 7 is bigger than 6 0.165
Step-by-step explanation:

- move the decimal point <em>n</em> place to the left
- move the decimal point <em>n</em> place to the right
Examples:
