The function describing the relationship of the given variables is a= 6r
How to write a function describing the relationship of the given variables.?
The statement is givn as:
a varies directly with r
This means that
a= kr
Where k is the constant of variation
When r = 6 , a = 18, we have
18= 6k
Divide by 6
k = 3
Substitute k = 3 in a= kr
a= 6r
Hence, the function describing the relationship of the given variables is a= 6r
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