Which relation is a direct variation that contains the ordered pair (2, 7) ?

Choices:

y=4x-1

y=2/7x

y=7/2x

y=7/x

(2,7) ⇒ x = 2; y = 7

y = 4x - 1 ⇒ y = 4 (2) - 1; y = 8 - 1; y = 7

y = 2/7x ⇒ y = 2/7 (2); y = 2/14; y = 1/7

y = 7/2x ⇒ y = 7/2 (2); y = 7/4; y = 1 3/4

y = 7/x ⇒ y = 7/2; y = 3 1/2

Among the choices, only y = 4x - 1 is the direct variation that contains the ordered pair (2,7)