Answer:
Explanation:
x is the number of GB
f(x) is the cost in dollars
f(x) = 10x
Bill for 6 GB = f(6) = 60
:::::
f(x) = 8x+15
Bill for 8 GB = f(10) = 95
f(x) = 5x+30
Bill for 2 GB = f(2) = 40
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