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7nadin3 [17]
3 years ago
12

Is y a function of x? 9y-3x-4=0

Mathematics
1 answer:
Elza [17]3 years ago
5 0
In other words, can 9y - 3x - 4 = 0 be solved for y, and, if so, is there always exactly one y value for every input (x) value?

9y = 3x + 4
Thus, y = (3/9)x + 4, or    y = (1/3)x + 4

No matter which real x you choose, y is always assigned exactly one value by this rule.  So, yes, this is a function.
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