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The domain is the x values, so x = 0 to 10. The range is the y values, so y = 0 to 25.
domain = x-values range = y-values for which x or y is a solution
domain is independent why? because its before range or also known as x/domain and y/range(x,y).
x + y = 18, x - y = 6 y = 18 - x x - (18 - x) = 6 x - 18 + x = 6 2x - 18 = 6 2x = 24 x = 12 (12) + y = 18 y = 6
The domain of y = 2x is [0, +infinity].