EllaTheCat EllaTheCat

31-01-2017
Mathematics

contestada

What is the range and domain of:

y= 4|x|-1

Respuesta :

31-01-2017

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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