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January 2018
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What are Domain and Range?
Students are often confused about domain and range of a function. Let's consider the list of points: {(1, 2), (3, 5), (6, 1), (4, 9), (3, 3)}.
The domain is all the xvalues, and the range is all the yvalues. Domain is: {1, 2, 6, 4, 3} Range is: {2, 5, 1, 9, 3} Problem:
Solution:
This is just your typical polynomial. There are no denominators (so no divisionbyzero problems) and no radicals (so no squarerootofanegative problems). There are no problems with a polynomial. There are no values that you can't plug in for x. When you have a polynomial, the answer is always that the domain of "all x".
Domain: "all x". For domain you have to find the value of y.
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