Find the Domain x-y=9

Problem

x−y=9

Solution

1. Solve the equation for y to express it as a function of x

y=x−9

2. Identify the type of function.

y=x−9

This is a linear function, which is a type of polynomial.

3. Determine any restrictions on the input variable x
   Polynomials are defined for all real numbers because there are no denominators that could be zero and no even roots of negative numbers.

4. State the domain in interval notation.
   The domain is all real numbers, represented as (−∞,∞)

Final Answer

Domain: *(−∞,∞)

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