sqrt(17) ≈ 4.123105625617661...
Because of the decimal portion, this is NOT a natural number, NOT a whole number, and NOT an integer.
Because the decimal portion goes on forever and doesn't repeat, this is NOT a rational number. (It cannot be written as a fraction.)
Because the decimcal goes on forever and doesn't repeat, this IS an irrational number.
Because it can be placed on a number line, it IS a real number.
