I don’t know Sorry I’m typing this, brainly says I have to answer 1 question in order to ask more and I’m taking a test right now, just ignore this I can’t risk failing, sorry.
f(x)=x-16 is just a straight line with a slope of one at a y intercept of -16. Therefore, x can hit all numbers in the x axis making the domain x is in the element of all real numbers.