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Direct Variation

Authored by Laura Delemos

Mathematics

9th Grade

CCSS covered

Used 6+ times

Direct Variation
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6 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

Is this direct variation?

yes
no

Answer explanation

To be direct variation, a graph must be a LINE and pass through (0,0).

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

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

Is this direct variation?

yes
no

Answer explanation

To be direct variation, a graph must be a LINE and pass through (0,0).

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

CCSS.8.SP.A.2

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

Which of the given graphs is a direct variation?

A
B
C
D

Answer explanation

To be direct variation, a graph must be a LINE and pass through (0,0).

Tags

CCSS.8.EE.B.5

4.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Which equation(s) represent direct variation?

y = 3x + 2

2y = 10x + 6

8x - 3y = 0

-4y = 2x

Answer explanation

Make sure to solve for y and then check if your equation looks like y = mx.

Direct Variation must be in the form y = mx where the y-intercept is 0.

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

The value of y varies directly with x.  Which function represents the relationship between x and y if y = 14 when x = 6. 

y=20x
y=84x
y=7/3x
y=3/7x

Answer explanation

Because direct variation is PROPORTIONAL, the slope (constant of variation) can be found by y/x.

y = mx is the correct equation where m is simply y/x.

Tags

CCSS.8.F.B.4

6.

FILL IN THE BLANKS QUESTION

5 mins • 1 pt

Answer explanation

Replace x with -6 and type in your calculator.

Tags

CCSS.6.EE.C.9

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