how do i solve this?

[night silo]

ik how to find f(x)^-1 but how do i write the range as asked in (ii)

[spark egret]

(ii):
Domain (x):
D_f^-1= {x | x∈R }

Range (y):
R_f^-1= {y | y∈R}

(I guess)

[heavy arch]

both are all real numbers since it's a straight line

[night silo]

ok thanks ☺️