Find an equation of variation in which y varies inversely as x and y=5 and x=15. Then find the value of y when x=10.

Answer 1

y = k/x
now use (15,5) to find k, and then y(10)

Answer 2

Is the answer 3

Answer 3

no. 5 = 75/15 so k=75
y(10) = 75/10