Respuesta :

texaschic101
y = 5.50x + 21...where x is the number of months and y is the total cost

function notation is basically subbing in f(x) for y

so ur rule in function notation is : f(x) = 5.50x + 21 <==
y=$5.50(x) + $21    where x us the number of months  This will give you the total cost.

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