What is the domain and range of f(x)= 4?

1 Answer
Stefan V.
Aug 16, 2015

Domain: (-oo, + oo)
Range: {4}

Explanation:

You're dealing with a constant function for which the output, i.e. the value of the function, is always constant regardless of the input, i.e. the value of x.

In your case, the function is defined for any value of x in RR, so its domain will be (-oo, + oo).

Furthermore, for any value of x in RR, the function is always equal to 4. This means that the range of the function will be that one value, {4}.

graph{y - 4 = 0.001 * x [-15.85, 16.19, -4.43, 11.58]}

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