What is the domain and range for y=4absx-1?

1 Answer
Oct 10, 2015

Domain: (-oo,oo)
Range: [-1,oo)

Explanation:

The domain is all real numbers because you can multiply 4 by any number from -infinity to infinity, although the only value used will be the absolute value. For example, if x= - 7 then y=27 because 4*|-7|-1=4*7-1.

Because x is absolute value, the lowest number you can have is zero. 4*0-1=-1 thus making -1 the lowest value you can have for y.