Doesn't play sport
Plays sport |
| |
V V
Takes language | 21 | 17 |
-----------------
Doesn't take language | 12 | 4 |
Class B has the most consistant sleep because there is less of a difference between 6.87 and 3.65 than the other classes.
"Joint variation<span>" means "directly, but with two or more variables". Thus, we write as follows:
j </span>α gv
<span>
We insert proportionality constant k, to change it to equality.
j = kgv
We solve k,
1 = k (4)(3)
k =1/12
j = gv/12
j = 8(11)/12
j = 22/3</span>
