Question

x vary inversely as y and y= 60 , then x= 1.5 . Find x when y = 4.5

Answer 1

x α (1/y)
x=k/y
when x=1.5,y=60
1.5=k/60
k=80
therefore
x=80/y
when y=4.5
x=800/45=160/9