If a function is proportional, what must the corresponding y-value equal when ? -1
0 1 there is not enough information to answer this problem.

There is not enough information to answer this problem.

Step-by-step explanation:

A proportional function means that if you change X, Y will change in the same proportion.  And that proportion of change will remain the same no matter which two values of X you take to compare them.  

But that proportion will vary from function to function.

Without knowing what the function is, it's impossible to know the value of Y for a given X... it could be anything.

72 is the answer to this problem

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