A) goats that weigh exactly 50 or 60 pounds fall into two classes.
b) a function may be formed using weights of goats as the x-value and weight range as the y-value.
c) goats weighing between 40 and 73 pounds fall into only one weight class.
d) a function may be formed using weight range as the x-value and the weight of a goat as the y-value.

A) Goats that weigh exactly 50 or 60 pounds fall into two classes. would be the right answer

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.