How do you find the domain and range of $f(x) = 2x - 8$ ?

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Answer 1 · 2017-07-25T15:04:15

$(-oo,oo)$ for both domain and range

Since the equation is a line, all values of $x$ produce a real value of $y$ .

As $x$ approaches $oo$ , $y$ approaches $oo$ .

As $x$ approaches $-oo$ , $y$ approaches $-oo$ .

Since the equation does not have fractions or radicals, both the domain and range take on all real values.

How do you find the domain and range of f(x) = 2x - 8f(x) = 2x - 8?