Because y varies inversely as x, therefore

where k = constant.
When x = 6, y = 2.5. Ther efore

Cross multiply.
k = 6 x 2.5 = 15
The equation is

When x = 4, obtain

Answer: a. 3.75
Answer:
12-4u
Step-by-step explanation:
You can not use either of them because neither of them have a variable= to the eqaution
ex.) y= 3x+25