Direct variation equations formulas

y varies directly as x

• y = x

• y = k

• y = kx

• y = k/x

Tags

CCSS.HSA.CED.A.2

CCSS.HSF.BF.A.1

CCSS.HSF.LE.A.2

T varies directly as D

• T = D

• T = kD

• D = kT

• D = T

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.SSE.A.1

W varies Directly as P

• P = kW

• P = W

• W = P

• W = kP

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.CED.A.4

CCSS.HSA.SSE.A.1

y is proportional to x

• y = kx

• y = x

• x =ky

• x = y

Tags

CCSS.HSF-LE.A.1B

B varies directly as L

• B = kL

• B = L

• L = kB

• L = B

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.SSE.A.1

CCSS.HSF.BF.A.1

CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.2

What is the formula for direct variation?

• y = x
• y= k/x
• y= x/k
• y = kx

Tags

CCSS.HSF.BF.A.1

CCSS.HSF.IF.A.1

CCSS.HSF.IF.A.2

What is the first step in solving a direct variation problem?

• solve for k
• put the value for k in the formula
• write the formula
• answer the question

Tags

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.3

What is the 2nd step?

• Write the formula
• plug in the values for x and y
• solve the problem
• solve for k

Tags

CCSS.8.EE.B.5

Direct variation graph must pass through ______

• 5,1
• center (0,0)
• every x value
• none of the above

Tags

CCSS.8.EE.B.5

Water varies directly as the squared of lemon

• w= l

• w= k

• l=kw

• w= kl²