A.2D Redo

Which of the following equations represents a direct variation?

• y = m/x

• y = m + x

• y = mx^2

• y = mx

If y varies directly with x, and y = 10 when x = 5, what is the value of y when x = 8?

• 16

• 25

• 20

• 30

If y varies directly with x, and y = 55 when x = 5, what is the value of y when x = 9?

• 99

• 0.81

• 81

• 45

If y varies directly with x, and y = 10 when x = 5, what is the value of y when x = 7?

• 14

• 25

• 7/2

• 30

If y varies directly with x, and y = 6 when x = 3, what is the value of x when y = 12?

• 8

• 2

• 4

• 6

If y varies directly with x, and y = 3 when x = 9, what is the value of x when y = 18?

• 8

• 2

• 6

• 54

If y varies directly with x, and y = 12 when x = 3, what is the value of x when y = 24?

• 8

• 6

• 4

• 96

If y varies directly with x, and y = 15 when x = 5, what is the value of y when x = 10?

• 25

• 30

• 10

• 20

If y varies directly with x, and y = 8 when x = 4, what is the value of x when y = 16?

• 2

• 8

• 12

• 6

If y varies directly with x, and y = 12 when x = 6, what is the direct variation equation?

• y=1/2x

• y=72x

• y=18x

• y=2x