Answer
True
Work Step by Step
Factoring $-1$ out of the numerator so that the resultant expression becomes equal to the denominator, we obtain:
$\frac{x-y}{y-x}$
=$\frac{-1(y-x)}{(y-x)}$
=$\frac{-1(1)}{(1)}$
=$-1$
Therefore, the statement is true.
