Question

y varies inversely with twice the value of x. When y = 10, x = 3. Find y when x = 5.
Choose one answer.
a. 4
b. 6
c. 10
d. 12

Answer 1

y=k/(2x)
10=k/(2*3)
6*10=k
60=k

y=60/(2x)=30/x

y=30/5=6

Answer 2

y=k/(2x)
10=k/6
k=60

y=60/(2*5)=6
choice b

Answer 3

x went up by 5/3, so y will go up by 3/5. 3/5 * 10 = 6