PLEASE Tyler went to the supermarket to buy food for a food pantry. He has $36, and can carry up to 20 pounds of food in his backpack.

Pasta costs $1 for a 1-pound package. Pasta sauce costs $3 for a 1.5 pound jar.

Let x = the number of packages of pasta and y = the number of jars of pasta sauce.

Select all that apply.

Choose the inequalities needed to describe the amount of pasta and pasta sauce that Tyler can buy.
x + 3 y ≤ 36
x + 1.5 y ≤ 20
x ≥ 0
x + 3 y ≥ 20
x + 1.5 y ≤ 36
x + 1.5 y ≥ 20
y ≥ 0
x + 3 y ≥ 36

I already know that
x + 3 y ≤ 36
x + 1.5 y ≤ 20
are correct, but my teacher marked me half wrong and said "could you have less than 0 of either the pasta or the pasta sauce?"

PLEASE HELP