Question

if y varies inversely as x and x=50 when y=2.7, find y when x=80.( round off your answer to the nearest tenth)

Answer 1

y = k*(1/x)

2.7 = k*(1/50)

solve for k

2.7/(1/50) = k

k = 135

no use your value for k to solve for y

y = 135*(1/80)

y = 135/80

y = 1.6875

round to nearest 10th

y = 1.7