VARIATION K3

 x is directly proportional to y. x=32 while y=4. Find y when x is 152.

 

Solution

 

x ⍺ y

x = ky

 

32 = k x 4

 

32 = 4k    [dividing by 4 both sides]

4      4

 

k = 8

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

 

k = 8, y= ? x = 152.

 

x = ky

 

152 = 8 x y

 

152 = 8y

8       8

 

y = 19  .

 

TRY THIS…………….

 

x is directly proportional to y. x=40 while y=4. Find y when x is 180.