Solve each problem involving direct variation. 11) If y varies directly as x, and y = - when x = 15, find y when x = 3. 12) If y varies directly as x, and y = 6 when x = 5, find y when x = 10. y= KX y = Kx 2 - K 13) If y varies directly as x, and y = 14 when x = 3, find y when x = 6. 14) If y varies directly as x, and y = 3 when x = 18, find y when x = 9. 15) If y varies directly as x, and y = 15 when 16) If y varies directly as x, and y = 3 when x = 9, find y when x = 3. x = 5, find y when x = 15. 17) If y varies directly as x, and y = 15 when 18) If y varies directly as x, and y = 2 when x = 3, find y when x = 4. x = 4, find y when x = 20. 20) If y varies directly as x, and y = 16 when 19) If y varies directly as x, and y = 3 when x = 2, find y when x = 4. x = 7, find y when x = 14