Rational Number

Definition:  A rational number is a number that can be written in the form a/b such that a and b are both integers and b is unequal to zero. (Integers are the numbers {...,-3,-2,-1,0,1,2,3,...})

Examples:  1/3, 7/8, -3/4, 13,/8, 0.9, -2.3

The decimal representation of any rational number will either terminate or eventually reach a repeating set of digits  (e.g. 1/4 = .25; 2/9 = .2222...; 1/7 = .142857142857142857...; 1/6=.166666...

The following are not rational:     Pi, the square root of 2, cube root of 11

Question: Is zero a rational number? Explain.

Question: What does it mean for a person's behavior to be rational?  irrational?