Asalad dressing calls for 3 parts oil and
1 part vinegar. manuela uses 2 tablespoons
of vinegar and 6 tablespoons of oil to make
her salad dressing.

The quantities used by Manuela were correct

Step-by-step explanation:

The question is

Did Manuela use the right quantities?

Let

x -----> the parts of oil

y ----> the parts of vinegar

we know that

The ratio of the parts of oil by the parts of vinegar of recipe is

Determine the relation used by Manuela

Compare with the recipe

Is true, the quantities are proportional

therefore

The quantities used by Manuela were correct

because they could drop even lower..

no he doesnt because "-16' is negatiive

step-by-step explanation: