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Why does the grahp show every second number instead of all the numbers from 0 through 20 in the scale?
Because if it has every single number (ie. 0-20) when it doesn't need to have ALL of them. So it just has every second one! To make it a better and smaller (and a bit more accurate) graph!
Is every number a rational number?
No but every integer is a rational number and numbers that can be expressed as fractions are also rational numbers
Is every rational number a whole number?
No. Every rational number is not a whole number but every whole number is a rational number. Rational numbers include integers, natural or counting numbers, repeating and terminating decimals and fractions, and whole numbers.
Is every irrational number a real number and how?
The set of real numbers is defined as the union of all rational and irrational numbers. Thus, the irrational numbers are a subset of the real numbers. Therefore, BY DEFINITION, every irrational number is a real number.
Is every whole number a natural integer and a rational number?
Every whole number is rational and an integer. But the "natural" numbers are definedas the counting numbers, so the negative whole numbers wouldn't qualify.No and yes: it is not a natural number but it is a rational number.
