Functions cannot have multiple outputs with the same input
Solution: D is the only function
Answer:
k = 4
Step-by-step explanation:
Given that a varies directly as b then the equation relating them is
a = kb ← k is the constant of variation
To find k use the condition a = 8 when b = 2
k =
=
= 4
It is B. You divide 10 by 25 and multiply it by 100