in the system shown below, what are the coordinates of the solution that lies in quadrant I? x^2-y^2=25, x+y=25
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For a relation to be a function it must be 
relation is not a function.
In the above options, C is relation therefore cannot be a function.
The reason is that 3 alone maps onto -2 and 5, in the ordered pairs (3,-2) and (3,5). This disqualifies it from being a function.
Hence the graph of this relation will not pass the vertical line test
In the above options, C is
The reason is that 3 alone maps onto -2 and 5, in the ordered pairs (3,-2) and (3,5). This disqualifies it from being a function.
Hence the graph of this relation will not pass the vertical line test