I need help with this equation

Question

write a linear function f with f(0)=3 and f(-6)=3

Answer 1

f(0) = 3

f(-6) = 3

that's the same as y=3, y=3

y = f(x) = 3

f(x) = 3. It's a horizontal flat line, with zero slope

x can be any value and y or f(x) = 3