### Brain Teasers

# Function Table #1

A function table is a table of order pairs that follow a rule. A rule tells how one number is related to another. In this brainteaser, I will give you a function table (sometimes called an input-output table) and you need to figure out what the rule is. I will give you an example.

Example:

Input(A), Output(B)

7(A), 9(B)

13(A), 15(B)

1(A), 3(B)

3(A), 5(B)

9(A), 11(B)

The rule in this example is add 2. Now here is the real deal. Find out what the rule is.

*This one will be harder than the example. Way harder.

Input(A), Output(B)

7(A), 23.98(B)

13(A), 42.82(B)

39(A), 124.46(B)

1(A), 5.14(B)

100(A), 316(B)

Example:

Input(A), Output(B)

7(A), 9(B)

13(A), 15(B)

1(A), 3(B)

3(A), 5(B)

9(A), 11(B)

The rule in this example is add 2. Now here is the real deal. Find out what the rule is.

*This one will be harder than the example. Way harder.

Input(A), Output(B)

7(A), 23.98(B)

13(A), 42.82(B)

39(A), 124.46(B)

1(A), 5.14(B)

100(A), 316(B)

### Hint

Pi*Pi is just a part of it.

### Answer

The rule to this function table is multiply A by pi (3.14) and add two. If you want to see it in an equation look below.A x 3.14 + 2 = B

Another way to write it:

A * 3.14 + 2 = B

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