What is the domain of f(x)?
{x|1 {x|1 {yl-4 {y|-4

Step-by-step explanation:

The picture of the question in the attached figure

we know that

The domain of a function is the set of all possible values of x

The domain of the line with negative slope is the interval [1,3)

The domain of the line with slope equal to zero (horizontal line ) is the interval [3,5)

so

The domain of the piece-wise function is the interval [1,5)

The value of x=1 is included in the domain set

The value of x=5 is not included in the domain set

multiplication is multiplication.   it might feel harder depending on what level of math you are in, but generally it will be the same old stuff, while implementing some new concepts and methods of solving work.