VARIATIONS 2

x is inversely proportional to y. x=12 while y=5. Find y when x is 4.

Solution

x ⍺ k

      y

x = k

      y

12 = k

        5

k = 12 x 5

k = 60

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k = 60, y= ?, x = 4.

x = k

      y

4 = 60

        y

y x 4 = 60  x  y   (multiply by y on both sides)

              y

4y = 60

4      4

y = 15  .

TRY THIS…………….

x is inversely proportional to y. x=200 while y=4. Find y when x is 8.