Which table shows a proportional relationship between x and y?

a. x 1 2 3 4
y 6 8 10 12

b. x 2 4 7 8
y 6 10 21 24

c. x 40 50 60 90
y 8 10 14 18

d. x 4 7 8 10
y 2 3.5 4 5

Asequence has its first term equal to 4, and each term of the sequence is obtained by adding 2 to the previous term. if f(n) represents the nth term of the sequence, which of the following recursive functions best defines this sequence? (1 point) f(1) = 2 and f(n) = f(n − 1) + 4; n > 1 f(1) = 4 and f(n) = f(n − 1) + 2n; n > 1 f(1) = 2 and f(n) = f(n − 1) + 4n; n > 1 f(1) = 4 and f(n) = f(n − 1) + 2; n > 1 i will award !