Question

The variables Y and X have a proportional relationship andY equals 15 when x=3. What is the value of X when Y =4?

Answer 1

4/5 or 0.8

Explanation:

y and x is directly proportional so when one increases the other also increases

the scale factor is 15/3 equals 5

so y is 4, x times 5 equals 4, which we rearrange to give 4/5 or 0.8