If x varies inversely with y and x = 6 when y = 10, how do you find y when x = 8?

1 Answer
Apr 2, 2018

Set up an equation x=1y substitute to find the constant
x×y=C Then substitute again to find the new y

Explanation:

x=C?y

6=C10 multiply both sides by 10

6×10=C10×10 This gives

60=C. Now substitute x for 8 in the equation and 60 for C

8=60y multiply both sides by y

8×y=60y×y This gives

8y=60 now divide both sides by 8

8y8=608 The answer is

y=7.5

As x gets bigger y gets smaller in an inverse relationship.