Which function has an inverse that is also a function?
{(-1, -2), (0, 4), (1, 3), (5, 1), (7,4)}
{(-1,2), (0, 4), (1,5), (5, 4), (7, 2)}
{1,3), (0, 4), (1, 14), (5, 6), (7, 2)}
{(-1,4), (0, 4), (1, 2), (5,3), (7, 1);

the two may have that, even a breakdown is probably offered

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.

question: how many people can she serve?

answer: she can serve 16.66666667 people. so she can only give 16 people a complete serving.

question: does she have enough ice cream for her guests?

answer: no. explanation: she only has enough for 16 people to have a full serving. however, she can give a 17th person a partial serving.