Direct Variation

(a)   is a relationship in which there is ar (b)   between all ordered pairs. These equations are written in the form ​ ​ (c)   .

• Direct Variation
• ratio

Identify which equations show direct variation and which do not.

Groups:

(a) Direct Variation

,

(b) Not Direct Variation

Match each direct variation equation to the constant of variation, k.

• 2

• -2

• 3

• -5

Match each equation with its constant of variation, k.

• k=-1

• not direct variation

• k=3

• k=7

• k=4

The graph of a direct varation equation will always pass through the origin. ​ (a)  

• true
• false

Tags

CCSS.8.EE.B.5

Create the graph of the direct variation shown.

Tags

CCSS.8.EE.B.5

What does "k" stand for in the direct variation equation?

• constant of equality

• constant of proportionality

• constant of non-proportionality

Tags

CCSS.HSF-LE.A.1B

Is the relationship in the table a direct variation?

• Yes

• No

Determine if there is a constant of proportionality, k.

If there is a k, what is it?

• There is no k

• k = 8

Tags

CCSS.7.RP.A.2B