Question

if Y is directly proportional to X and when x is equal to 3 Y equal to 15 find (1) Y when x is equal to 4 (2) X when Y equal to 30​

Answer 1

3x=15y

So x=5y

1)4x=5y×4

=20y

2)x=( 30y=1/15y

y=1/15y ×30)

= 2x