Y varies directly as the square of x. Find k when x = 3 and y = 12. S Y varies directly as x. Find y if x = 3, y when y = 5 if x = 2. B Find the variation constant if y = 48 and x= 6 if y varies directly as the square of x. E Find y, in the y 12 proportion: 4 5 L Find an equation of variation if y varies directly as x and y = 15 when x= 4. S If the constant of a direct variation 15 is find x 4 when y = 10. The perimeter of a square varies directly as its side. Find the constant of variation. S 3 Write an equation for the phrase: The electric current I in an electric circuit varies directly as the Voltage V. L If the constant of variation 5, find y when x= 7. If y varies directly as x and y = 10 when x = 5, find y when x = 15. Write the equation of variation: The distance (d) in km covered by a train varies directly as its speed (s) in kph. D Determine the constant of variation in the table: x 2 4 6 8 y 5 10 15 20 If y varies directly as x V E​