Direct Variation

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

• 26

• 3

• 58.5

• 2

Tags

CCSS.8.EE.C.7

CCSS.8.F.A.1

CCSS.8.F.B.4

Y varies directly with x, and y is 16 when x is 32. Which equation represents this situation?

• y = 32x

• y = 16x

• y = 2x

Tags

CCSS.7.EE.B.4

CCSS.7.RP.A.2

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.8.EE.C.7

CCSS.8.F.B.4

CCSS.8.SP.A.3

Is this a direct variation

• Yes

• No

Tags

CCSS.8.EE.B.5

CCSS.8.EE.B.6

CCSS.8.F.A.3

CCSS.8.F.B.4

CCSS.8.SP.A.2

Is this direct variation?

• Yes

• No

Tags

CCSS.8.EE.B.5

CCSS.8.EE.B.6

CCSS.8.F.A.3

CCSS.8.F.B.4

CCSS.8.SP.A.3

Which graph shows a proportional relationship between x and y? (Proportional = direct variation)

• A

• B

• C

• D

Tags

CCSS.8.EE.B.5

CCSS.8.EE.B.6

What ordered pair does a direct variation always go through when graphed?

• (0,1)

• (1,0)

• (0,0)

• (1,1)

Tags

CCSS.8.EE.B.6

CCSS.8.F.B.4

What is another name for k?

• y-intercept

• b

• Slope (m)

• x-intercept

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

CCSS.8.F.B.4

If 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

Tags

CCSS.8.F.B.4

CCSS.8.SP.A.2

If y = 4 when x = -4, find y when x = 7

• 7

• -7

• 1

• -1

Tags

CCSS.8.EE.C.7

CCSS.8.F.A.1