Direct Variation

If y varies directly with x, and y = -20 when x = 3, what is y when x = 15?

• 100

• -2.25

• 2.25

• -100

If y varies directly with x, and y = 8 when x = 3, what is x when y = -56?

• 21

• -21

• -149.33

• 149.33

If y varies directly with x, and y = 21 when x = -7, what is y when x = 42?

• -126

• 14

• -14

• 126

Tags

CCSS.7.RP.A.2B

If y varies directly with x, and y = 26 when x = -1, what is x when y = -78?

• 2028

• -2028

• 3

• -3

If y varies directly with x, and y = 16 when x = 32, what is y when x = -60?

• -30

• -120

• 30

• 120

If y varies directly with x, and y = 8 when x = -4, what is x when y = -48?

• -96

• 24

• 96

• -24

Tags

CCSS.7.EE.B.4

CCSS.7.RP.A.2

If y varies directly with x, and y = $\sqrt{49}$   when x =  $\sqrt{196}$  , what is y when x =  $\sqrt{100}$  ?

• -5

• 20

• 5

• -20

If y varies directly with x, and y =  $\sqrt{9}$    when x =  $\sqrt{81}$  , what is x when y =  $\sqrt{144}$  ?

• 4

• 36

• -4

• -36

If y varies directly with x, and y = 0.66 when x = 8, what is y when x = 200?

• 16.5

• 2424.24

• -2424.24

• -16.5

If y varies directly with x, and y = 0.5 when x = -5, what is x when y = 3.5?

• -0.35

• 0.35

• 35

• -35