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22 votes
22 votes
Suppose y varies directly as x², and y = 160 when x = 4. Find y when x = 6.

User Steffenj
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1 Answer

12 votes
12 votes

Finding the constant of proportionality :

  • y = kx²
  • 160 = k(4)²
  • k = 10

Finding y when x = 6 :

  • y = 10(6)²
  • y = 10(36)
  • y = 360

The value of y is 360 when x = 6.

User Scarabee
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3.0k points