Proportional relationships!
need on!

Direct variation has this equation:

y = kx

where k is the constant of variation

y = -5 ; x = -15

y = kx
-5 = k(-15)
-5/-15 = k
1/3 = k

Choice D. y = 1/3 x 

Lose 2 oz of water in 1st minuteand loses 2 oz of water in 2nd minute.
this is false because this will not equal 0it will equal -4 oz...because it is losing a total of 4 oz in 2 minutesFALSE

the diver descends to the shipwreckand then returns to the surfacethis one is true. Lets say the shipwreck is 20 ft below the surfaceso he descends 20 ftthats -20but then he ascends (comes back up) 20 ftand -20 + 20 = 0TRUE