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{2}Restate the question: what is the range of y=2?On an x-y grid, the equation y=2 represents a horizontal line which crosses the y-axis at 2.The domain (the set of possible x-values) is the set of real numbers.The range (the set of y-values you get when you plug in the x-values) is just 2, since the y- value is 2 eeverywhere on the line.
vertical
A vertical line has the same x-value. A horizontal line has the same y-value. The equation, y=3 would graph as a horizontal line crossing the y-axis at 3.
Yes. In fact, all the elements of an infinitely large domain can have the same value from the range set. The horizontal line, y = 3 for all real x, is an example of this extreme case.
Things whose values do not change.