2.06 (Distinguishing functions: Practice)

The type of number we normally use, such as 1, 15.82, −0.1, 3/4, etc.

Positive or negative, large or small, whole numbers or decimal numbers are all Real Numbers.

They are called "Real Numbers" because they are not Imaginary Numbers.

Includes:

• the counting numbers {1, 2, 3, ...},

• zero {0},

• and the negative of the counting numbers {-1, -2, -3, ...}

We can write them all down like this: {..., -3, -2, -1, 0, 1, 2, 3, ...}

Examples of integers: -16, -3, 0, 1, 198

Part 1: Which number type is more appropriate for the domain of T(a)?

A) Integers

B) Real numbers

Part 2: What's the appropriate domain?