Your answer is 0, because the equation for this is y=1. Only vertical lines can have an undefined slope because the x value never changes. Hope this helps.
: )
2/3 would be the value of this expression:)
<span>D. r + (-r) = 0
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The additive inverse<span> of a number a is the number that, when added to a, yields zero. This number is also known as the opposite.</span>
