The mapping diagram shows a function t(x). which mapping diagram shows the inverse of t(x)?

The values of the domain are:
 D: {1, 3, 5, 7}
 The values of the range are:
 R: {2, 4, 6, 8}
 When we find the inverse of the function, then the domain and the range are reversed.
 Therefore, we have that for T ^ -1 (x):
 The domain is:
 D: {2, 4, 6, 8}
 The range is:
 R: {1, 3, 5, 7}
 
 The inverse of T (x) is:
 option B

It would be 18 cm