The cost per bushel of corn at Farm A is constant. The graph shows the total cost, C, in dollars, of purchasing different numbers of bushels of corn..

[eddy2017]

I have been studying this problem and reflectin on it before posting it, like I have been advised to do.

 

[eddy2017]

I havethe cost on the y-axis and the number of bushels on the x-axis.
I need to find the phrase that represents the independent variable
The phrase that represents the dependent variable
The equation represents the graph.
I see that I have been given the cost per bushel is constant so each bushel is going at the same price.
what I see here is that when I divide the cost of the bushel by the amount I see that is proportional because
32/10=3.2
64/20=3,2 and so forth and so on...
[math]C=p * x[/math]where C=total cost
p= price per bushel
x=number of bushels
So I see the higher the cost the higher of number of bushels so the increase is directly proportional.

but I am not getting the independent or dependent variable.
I have read online that
The independent variable belongs on the x-axis (horizontal line) of the graph and the dependent variable belongs on the y-axis (vertical line).
so that means that b (number of bushels ) is the independent variable here?
and that c (cost per bushel of corn) is the dependent one?
I am in doubt as to the equation that represents the graph
thanks for any help

 

[eddy2017]

Taking a second look I think b is the dependent variable. there is a fixed price per bushel that does not change,
on the other hand, C(b) is the total cost depending on b.
Is this analysis of the graph correct or am I missing something here?.

 

[eddy2017]

An equation that represents the graph could be:
C(cost) =3.2(b)