SOLUTION: Determine whether the relation is a function: 8y = 7 + 3x

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Question 547550: Determine whether the relation is a function: 8y = 7 + 3x
Answer by KMST(5328) About Me  (Show Source):
You can put this solution on YOUR website!
You can solve for y and get y=%283%2F8%29x%2B7%2F8 which assigns just one y value to each x value, so it is a function.
The relation x%5E2%2By%5E2=1is not a function because for x=0 there are two values for y: y=1 and y=-1.
Another way of checking is looking at a graph and seeing if a vertical line could intersect the graph more than once.
The graph of +8y+=+7+%2B+3x is a slanted line, so it's a function.
The graph of x%5E2%2By%5E2=1is a circle, so you know it's not a function because a vertical line can cross the circle at two points.