Domain measures X values. Since X isn't restricted by square roots or in the denominator the domain is all real numbers.
Range measures Y values. Since X can be anything Y can be anything.
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The domain consists of all values of x for which there is a point on the graph. Similarly, the range applies to all the y values.
domain: (-infinity to infinity) range: ( -infinity to infinity)
The domain would be (...-2,-1,0,1,2...); the range: (12)
domain: all real numbers range: {5}
Domain is the spectrum of values on the x-axis. Domain will be which x-values can be plugged into that equation and give an answer. Range is the same thing, but y-values. On the graph it will be the y-values that are included in the graph.