How Do You Find The Domain & Range?
The domain and the range are mathematical terms used in algebra. They refer to the numbers that can be put into a formula and that can result from the formula. The domain, typically x, describes the numbers that can be used in the formula without it resulting in a division by zero or the square root of a negative number. The range defines the number(s), typically y, that can result from the formula. Domain and range are terms often referred to when graphing algebraic formulas. Check to see if you are provided the data points of the graph. If you are, the domain includes all of the first numbers in the data points and the range includes all of the second numbers in the data points. Examine the formula closely. If it is a fraction, with “x” in the denominator, write out an equation where 0 = denominator. Solve the equation for x. That number, which would give you zero in the denominator, cannot be in the range. By definition, the range for this function is all numbers except the one(s) t
