Question

if x and y are in direct proportion with constant 15, find y when x= 5. find x when y=3

Answer 1

if x and y are in direct proportion ,

then , x / y = constant

here constant = 15

therefore , x/y = 15

when x =5 ,

y= 5 /15

y = 1 /3


when y = 3
x = 15 ×3
x = 45