B is correct since there is one output for every input !!
have a great day :))
Answer:
.
Step-by-step explanation:
Density is the degree of compactness of a substance. It is the degree of consistency measured by the quantity of mass per unit volume. It is the relationship between the mass of the substance and the amount of space it takes up. I hope it helps.
X ( x - 6 ) represents<span> the amount of apartments in the unknown floor. ( x )</span>