Question

Which are counter examples of the following statement?

If the sum of x and y is negative, then both x and y are negative.
x = -2 and y = -4
x = -10 and y = 5
x = -6 and y = 0
x = 15 and y = -2

Answer 1

...
x=-6 and y = 0 because the sum is negative but they are not both negative.
so is x=-10 and y = 5.

Answer 2

x = -6 and y = 0

Sum is -6. 0 is not negative.


And x = -10 and y = 5

Sum is -5. 5 is not negative.