Direct Variation

Which graph shows a proportional relationship between x and y?

• A
• B
• C
• D

Write an equation for this situation.

• y=9.75x
• y=19x
• y=19.25x
• y=9.5x

Tags

CCSS.6.EE.C.9

Is this proportional?

• yes
• no

Tags

CCSS.7.RP.A.2D

Find the unit rate:  $3.60 for 3 pounds of apples. How much does it cost for 1 pound of apples?

• $1.00 per pound
• $3.60 per pound
• $1.20 per pound
• $1.10 per pound

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Write an equation for this relationship.

• y=4x
• y=1/8x
• y=1/4x
• y=8x

Tags

CCSS.6.EE.C.9

The amount of money earned on a job is directly proportional to the number of hours worked.  If $70.00 is earned in 5 hours, how much money is earned in 22 hours of work?

• $2
• $308
• $1.57
• $265

Write the equation for the table given.

• y = 1/3x
• y = 3x
• y = 1/2x

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

The number of kilograms of water in a person’s body varies directly as the person’s mass.  A person with a mass of 90 kg contains 60 kg of water.  How many kilograms of water are in a person whose mass is 75 kg?

• 50 kg water
• 72 kg water
• 94 kg water
• 150 kg water

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

 Y varies directly with x, and y is 84 when x is 16. Which equation represents this situation?

• y=1344x
• y=100x
• y=5.25x
• y=4/21x

The interest received on a savings account varies directly with the amount deposited. Daniel received $55.35 in interest on $1230 he deposited. How much interest would Daniel have received if he had deposited $2000 into his account?

• 34.04
• 90.00
• 1,285.35
• 44,444.44