SOLUTION: If y varies inversely as x and y = 3 when x = 3, find y when x = 4. A. 1 B. 2.25 C. 3.5 D. 4

Algebra ->  Test -> SOLUTION: If y varies inversely as x and y = 3 when x = 3, find y when x = 4. A. 1 B. 2.25 C. 3.5 D. 4      Log On


   

Question 436237: If y varies inversely as x and y = 3 when x = 3, find y when x = 4.
A. 1
B. 2.25
C. 3.5
D. 4
Answer by htmentor(1343) About Me  (Show Source):
You can put this solution on YOUR website!
If y varies inversely as x, we can write:
y = k/x, where k is a constant
If y=3 when x=3, then k=y*x = 3*3 = 9
So the equation is y = 9/x
If x = 4, y = 9/4 = 2.25
So the answer is B.