Question

If x and y vary directly, and x = 12 when y = 3, what will be the value of x when y = 9?

Answer 1

2.5 i think. hope this helps u

Answer 2

36

Explanation:

When a variable increases directly with another variable, it means that when one gets increased, the other must be increased by the same amount, therefore if X=12 when Y =3 then Y=3*3 aka 9 then X=12 must also be multiplied by 3 which equals 36