Direct and Inverse Variation Test

Which of the following is the equation format for direct variation?

• y = mx + b

• y = kx

Tags

CCSS.HSF.BF.A.1

CCSS.HSF.LE.A.2

CCSS.HSF.LE.A.1

What is the equation to find "k", the constant of proportionality?

• y = kx

• y = mx + b

Tags

CCSS.7.RP.A.2B

The phrase "y varies directly with x" means a relationship is a direct variation.

• True

• False

Tags

CCSS.HSF.BF.A.1

CCSS.HSF.LE.A.2

CCSS.HSF.LE.A.1

CCSS.HSF.IF.A.1

Is the relationship in the table a direct variation?

• Yes

• No

Tags

CCSS.HSA.CED.A.2

CCSS.HSF.BF.A.1

CCSS.HSF.LE.A.2

CCSS.HSF.LE.A.1

CCSS.HSA.REI.D.10

CCSS.HSF.IF.B.4

CCSS.HSS.ID.C.7

What is the equation for the given relationship in the table?

Tags

CCSS.6.EE.C.9

Does the graph show a direct variation?

• Yes

• No

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

CCSS.HSS.ID.C.7

What is the equation for the given graph?

Tags

CCSS.8.EE.B.5

Suppose y varies directly as x. If y = -7 when x = -14, find x when y = 10.

• -5

• 3

• 9.8

• 20

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.3

Suppose y varies directly as x. If y = 3 when x = 15, find x when y = 5.

• 25

• 17

• 9

• 1

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.3

The number of books sold varies directly as the cost of the books. If 8 books cost $10.40, how many books can be bought for $32.50?

• 25 books

• 30 books

• 32 books

• 42 books

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.SSE.A.1

CCSS.HSA.REI.B.3