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Use a graphing tool and you'll see a circle form. This circle has a center of (0,0) and radius of 4. Side note: this equation is equivalent to x^2+y^2 = 16 after you divide everything by 4
Looking at the graph, the smallest x can be is -4. The largest x can be is 4. So the domain in interval notation is![[-4,4]](https://tex.z-dn.net/?f=%5B-4%2C4%5D)
Similarly the range in interval notation is also <span> because the lowest you can go is y = -4. The highest you can go is y = 4</span>
Looking at the graph, the smallest x can be is -4. The largest x can be is 4. So the domain in interval notation is
Similarly the range in interval notation is also <span>