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How do you know which relation is NOT a function? (How do you determine or figure that out)
1.) y=2x+4
2.) y=x^2-4x+3
3.) x=3y-2
4.) x=y^2+2x-3
8 years ago

Answers

Steve
As written, each is a function.

Now, if you want to check whether y is a function of x, just check to be sure that for each x value there is a single y which satisfies the equation.

hint: (-3)^2 = (+3)^2 for example
8 years ago

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