Question

"Y varies directly as x'. If y = 9 when x = 3, find y when x = 18. What is the constant of variation (k)?​

Answer 1

Y = 21 when x=18

X varies 3 numbers subtracted from Y so now it comes as x= 18 then y is plus 3 the the number shown on x which is 18+3 then you get 21.