What is the domain and range of #y = x^2 + 4#?

1 Answer
Júlio B.
Dec 28, 2015

D:f(x) -> #R#
R:f(x) -> #4<R#

Explanation:

graph{x^2 + 4 [-95.84, 95.84, -47.9, 47.94]}
When we look at the graph, we're able to see that the minimum value for Y is 4, but it has no maximum value. X in turn, can have any value. So, the domain is the range of values that x can have - any royal number in this case - and the range is the range that y numbers can have - any value higher than 4.

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