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Step-by-step explanation:

Since the integers are consecutive,

let the smaller one be x

then the larger will be x+1

Now their sum is -15

x+x+1=-15

2x=-15-1

2x=-16

x=-8

Therefore the smaller is -8 and the larger is -7

Now when one is added to the smaller integer it becomes -8+1=-7

If 2 is subtracted from the larger one it becomes -7-2=-9

their product therefore becomes -9×-7=63

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

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step-by-step explanation: