VARIATION 2

x is directly proportional to y. x=24 while y=4. Find y when x is 60.

Solution

x ⍺ y

x = ky

24 = k x 4

24 = 4k

4      4

k = 6

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

k = 6, y= ? x = 60.

x = ky

60 = 6 x y

60 = 6y

6      6

y = 10.

TRY THIS…………….

x is directly proportional to y. x=48 while y=12. Find y when x is 70.