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The table shows how the height of a stack of DVDs depends on the number of DVDs. What is a rule for the height?


Number of DVDs


Height (cm)

2

18

3

27

4

36

n

?

Ah = 9n

Bh = 8n

Ch = 2n

Dh = n/9

Verified Answer :

syed514

The right option is A.

Answer: Option 'A' is correct.

Step-by-step explanation:

Since we have given that

Number of  DVDs    Height

           2                        18

           3                        27

           4                        36

Since there is direct proportion between number of DVDs and height.

We need to find if the number of DVDs is n, then height would be

\(\dfrac{2}{18}=\dfrac{n}{h}\\\\\dfrac{1}{9}=\dfrac{n}{h}\\\\h=9n\)

Hence, the rule for the height for n is h = 9n.

Option 'A' is correct.

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