Final answer:
The ratio of jars of sauce to boxes of noodles for the lasagna is 2:1.
Step-by-step explanation:
To find the ratio of jars of sauce to boxes of noodles for the lasagna, we need to determine the number of trays that can be made from a given number of boxes of noodles.
Since one box of noodles can make 2 trays of lasagna, the ratio is 2 trays of lasagna to 1 box of noodles. Therefore, the ratio of jars of sauce to boxes of noodles for this lasagna is also 2:1.