VARIATIONS J1

 

x is directly proportional to y. x=32 while y=8. Find y when x is 188.

 

Solution

 

x ⍺ y

x = ky

 

32 = k x 8

 

32 = 8k    [dividing by 8 both sides]

8      8

 

k = 4

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

 

k = 4, y= ? x = 188.

 

x = ky

 

188 = 4 x y

 

188 = 4y

4        4

 

Hence y = 47.

 

TRY THIS…………….

 

 

x is directly proportional to y. x=40 while y=4. Find y when x is 270.