**R = Xm - Xo**

**R = range**

**Xm = largest
observation**

**Xo = smallest
observation**

Once the data are arranged into a frequency distribution, the range is estimated through finding the difference between the lower boundary of the lowest class and the upper boundary of the highest class. Furthermore, the range cannot be calculated if there are any open end classes within the distribution.

Domain and range mean the identical thing in quadratics as in anyplace else

**range is the values
that the y's finish up being**

**domain is the values
which x is permitted to be**

because quadratics have a turning point (max/min, vertex) the range is not all real numbers, it is y > or equivalent to the y of the turning point for any parabola that opens up and y < or equivalent to the y of the turning point for any parabola that opens down, since the y's do not continue in the identical direction, they turn around.

The domain is generally all real numbers, but occasionally they will tell you to graph a specific domain (like x between -3 and 3) or occasionally it is a word problem which forces a certain domain because you cannot have negative dimentions or negative time and often cannot have negative height.

Rational Functions are a correspondence among two sets, known as the range and the domain. When determining a function, you often state what type of numbers the range (f(x)) and domain (x) values could be. However even if you state they are real numbers, that does not mean that most real numbers can be employed for x. It also does not mean that most real numbers could be function values, f(x). There could be restrictions on the domain and range. The restrictions partly rely on the type of function.

**Restricting the
domain**

You can find two primary reasons why domains are restricted.

You cannot divide by 0.

You cannot take the square (or other even) root of a negative number, as the result will not be a real number.

**In what type of
functions would these two issues take place?**

Division by 0 could occur whenever the function features a variable in the denominator of any rational expression. That is, it is something to appear for in rational functions.

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