\"\"

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Number of years from 1980 to 1990: \"\". \ \

\

\

Ticket price \"\"

\

\"\"       (Substitute y = 10)

\

\"\"       (Evaluate power: \"\")

\

\"\"         (Multiply: \"\")

\

\"\"              (Divide: \"\")

\

\"\"                                   (Add: 0.25 + 0.7 + 2.96 = 3.91) \ \

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The average price of a ticket in 1990 is 3.91$.\"\"

\

Number of years from 1980 to 2000: \"\".

\

Ticket price \"\"

\

\

\"\"       (Substitute y = 20)

\

\"\"       (Evaluate power: \"\")

\

\"\"         (Multiply: \"\")

\

\"\"                   (Divide:  \"\")

\

\"\"                                   (Add: 1 + 1.4 + 2.96 = 5.36)

\

\

The average price of a ticket in 2000 is 5.36$.\"\"

\

Number of years from 1980 to 2010: \"\"

\

\

Ticket price \"\"

\

\"\"       (Substitute y = 30)

\

\"\"       (Evaluate power: \"\")

\

\"\"         (Multiply: \"\")

\

\"\"              (Divide:  \"\")

\

\"\"                                   (Add: 2.25 + 2.1 + 2.96 = 7.31)

\

\

The average price of a ticket in 2010 is 7.31$.\"\"

\

The average price of a ticket in 1990 is 3.91$.

\

The average price of a ticket in 2000 is 5.36$.

\

The average price of a ticket in 2010 is 7.31$.

\