What is the domain of the function?

all real numbers less than or equal to 4

all real numbers greater than or equal to –3

all real numbers greater than or equal to –1

all real numbers between –3 and 1, inclusive

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.