Question

If y= 3 when x= 15, find the value of y when x= 75

Answer 1

Answer: Y=15

Explanation:

Answer 2

y = 15

Explanation:

Let x vary directly to y

x ∝ y ; x=ky where 'k' is the propotionality constant

k = x/y; k = 15/3

k=5; But x=75

∴ 5 = 75/y; 5y =75

y = 75/5

y = 15