Question

Domain and range of y = x2 + 9

Answer 1

Answer: Find the domain by finding where the equation is defined. The range is the set of values that correspond with the domain.

Domain:  

(−∞,∞),{x|x∈R}

Range:

[9,∞),{y|y≥9}

Answer 2

Algebra Examples

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined. The range is the set of all valid y values.