Answer:
A.
Step-by-step explanation:
A function is a relation in which every input or value in the domain is paired with exactly one output or value in range.
Draw vertical to check if there is one output for one input.
Hope it is useful...
Answer:
Step-by-step explanation:

translate 3 units up will change the y coordinate so will add 3 to y or f(x)

translate 4 units to the left will change the x coordinates so will add 4 to the x to move towards left

Hello!
Let's divide our 48 students among groups of 3 students below.
48/3=16
Therefore, there are 16 debating teams.
I hope this helps!