How do you find the domain and range for #y=x^2#?

1 Answer
georgef
Aug 21, 2016

The domain of a function is the largest set where the function is properly defined. The range is the largest set of values taken by the function.

Explanation:

The function #y=x^2# is defined by all #x# values, given that all real numbers #x# can be raised to the square. However, when a number #x# is raised to the square it is always positive; that is, regardless of whether #x>=0# or #x<0# the value #x^2>=0#. Hence the range of the function is all #y>=0#

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