Question

Give an example of a rational function that has a horizontal asymptote at y = 1 and a vertical asymptote at
x = 4.

Answer 1

try

y = x/(x-4)

Answer 2

It's not a multiple choice question, so I'll just take your word for it.

Answer 3

yes... vertical asymptotes are the values of x that make the denominator zero

x - 4 = zero means x = 4

thus you have the vertical asymptote

the horizontal asymptote of y = 1 requires the numerator and denominator are the same degree and have the same coefficient

here is another example

y = 3x/(3x - 12)