For this case we have a direct variation of the form:

Where,
- <em>k: proportionality constant
</em>
We must find the value of k.
For this, we use the following data:

Therefore, replacing values we have:

Rewriting:

Clearing the value of k we have:

Therefore, the direct variation equation is given by:

Answer:
The quadratic variation equation for the relatonship is:

Answer:
Option D
Step-by-step explanation:
If the whole grid is considered to be 1,
Each small grid will value = 
There are 72 shaded grids which represent the hundreds = 0.72
When these grids have been divided into 9 equal rows, number of grids in each row = 8
And the value of 8 grids in each row = 0.01 × 8 = 0.08
So the equation is,
0.72 ÷ 9 = 0.08
Therefore, equation represented by the model will be Option (D).
If he mass is 10 then the volume is 100
Answer:
Answer: Option d. 4×
Step-by-step explanation:
In any sequence where ratio of the terms is given we always use the formula
A(n) = A(1)
Here A(n) is the term n
A(1) is the first term
n= number of trms
and r = ration of the terms
Here the given sequence is 40,0.4,0.004........
So A(1) = 40
Ratio 'r' of second and first term is =0.4/40=1/100
We have to find 7th term so n=7
Now we put the values in the formula
A(7) = 
=
= 
= 40×
= 4×