H varies jointly with 2 and A and inversely with b.
What is combined variation?
Combined variation is a combination of direct, inverse, and joint variation. A variable depends on two (or more) other variables, and varies directly with some of them and varies inversely with others (when the rest of the variables are held constant).
For the given situation,
The formula is [tex]h=\frac{2A}{b}[/tex]
Here the variables A, b are independent variable and the variable h is the dependent variable.
The variable h varies directly as 2 and A varies. That is if 2 and A gets increased then the value of h also gets increased. And if A is decreased then the value of h also decreases on keeping b as constant.
Then, the variable h is inversely proportional to b. Because as b increases h will decrease and if b decreases, h will get increased on keeping 2A as constant.
Hence we can conclude that h varies jointly with 2 and A and inversely with b.
Learn more about combined variation here
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