Which of the following is the inverse relation of the set? {(3, 1), (4, 2), (5, 3), (6,4)}

A) {(1, 3), (2, 4), (3,5), (4, 6)}
B) {(3, 1), (4, 2), (5,3), (6,4)}
C) {(2, 1), (4,3), (5, 3), (6,4)}
D) {(2,4), (3, 3), (5, 4), (6, 1)}

Help with this question please and fast

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

the answer is 15% decrease

equal to

step-by-step explanation: