math hw help need

Question

Find the domain of the function f(x)=13x+5f(x)=13x+5. What is the only value of xx not in the domain?

Only Value=

Answer 1

f(x) = 13x+5 is graphically a straight line

with slope 13, y intercept =5

the domain is all real numbers

if f(x) had been (13x+5)(x-a)/(x-a) where a is some constant

then it would be the same straight line but with a "hole" in it

such that the domain would be all real numbers except x=1

Answer 2

f(x) = 13x + 5, the domain is all real numbers, no exceptions.