Question

Y varies derectly as x and y=10 when x=2.5 find y if x =18

Answer 1

y = 72

Explanation:

y∝x

y=kx

10=2.5k

k=10/2.5

k=4

equation connecting y and x is giving as

y=kx

y=4x

when x=18

y =4*18

y = 72

Answer 2

y=72??

I hope this is right .-. I havent done this kind of question in a while