Question

which of the following describes a one-to-one function? A. y=|x|, B. y=[[x]] C. y={ 4: x<0; 5: 0,(or equal to)x<(or equal to)2; 6: x>2 or D. y={5x-1: x<-2; x-9: x>(or equal to) -2 ???

Answer 1

Here's the problem.