Which equation below is a direct variation?
a. 1/6x=y
b. x + 2 = y
c. y + 2 = x
d. y = 2x + 6

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

check for the pregnancy rating of drug. if its class c or d see if other alternatives