Direct Variation

Is this a direct variation?

• yes
• no

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

CCSS.HSF.BF.A.1

CCSS.HSF.IF.B.4

CCSS.HSF.IF.C.7

CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.2

What is another name for k?

• y- intercept

• x

• constant

• x- intercept

A dishwasher uses 65 gallons of water to wash 5 loads of dishes. What is the constant of variation?

• k = 13
• k = 65
• k = 5
• k = 1/13

Tags

CCSS.HSF-LE.A.1B

What does the Direct Variation Equation look like?

• y= kx

• y = mx + b

• y = b

• y = x

If y vaires directly with x and y= 12 when x= 15. What is the value of x when y= 16?

• 12.8
• 20
• 11.25
• 19

Tags

CCSS.7.EE.B.4

CCSS.7.RP.A.2

Write an equation that relates x and y. x=7, y=35

• y=5

• y=5x

• y=7x

• 7=yx

In a direct variation, y=39 when x=3.  Find the value of y when x=2.

• 26
• 3
• 58.5
• 2

Tags

CCSS.7.RP.A.2

Do x and y show a direct variation?

• yes

• no

Is this a direct variation?
y=2x

• yes
• no

Tags

CCSS.7.RP.A.2

CCSS.7.RP.A.3

Trina's paycheck earnings varies directly as the number of hours she works. If she works 19 hours and earns $187.15, what should she earn if she worked 40 hours? 

• $394
• $440
• $472.80
• $512.20

Tags

CCSS.7.EE.B.3

CCSS.7.RP.A.2

CCSS.7.RP.A.3