Question 245922
if you have a f(x)=3x+9x(4) problen or that type of problem on atest would your answer be wrong if you just put =the answer, so does it have to be in an ordered pair???
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You might be asked for the value of y when the value of x is given.
OR
You might be asked for the value(s) of x when the value of y is given.
OR
You might be asked for the x intercept or the y intercept which are 
ordered pairs.
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The answer(s) depend on what the problem requests.
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Cheers,
Stan H.