On the way to the lake you stop at a nearby shop to buy some food and drink. you pick up a 1.5 litre bottle of water. one friend picks up a 2000 ml bottle. another friend picks up a 330 ml bottle. order the bottles with the largest at the bottom.

We know that 1000 mL = 1 liter, so we can conclude that the 1.5 liter bottle is equal to 1500 mL. The rest is trivial.

The order from smallest to largest is 330 mL, 1.5 liters, and 2000mL

You said largest at the bottom, so here it is in vertical format:

330 mL

1.5 liters

2000 mL

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right

the answer is y < -3 or   y > 3

-3y > 7 + 2

-3 y > 9

y < -3