Answer :

lukyo
Function: y = 4|x| - 1.


Domain: R (all real numbers).


Range: As we know, the absolute value of x is always a non-negative number:

|x| >= 0

4|x| >= 4 * 0

4|x| >= 0

4|x| - 1 >= -1

y >= -1 <----- this is the range


I hope this helps. =)

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