For the last 29 years the operator of a toll bridge has kept records of the use of the bridge during each month of the year. For the upcoming month of May, he would like to predict the expected income from operation of the bridge. From the data given below and the toll charge of $0.50 per vehicle, what is the expected income for the bridge during the month of May.
|
Year
|
Number of Cars
|
Year
|
Number of Cars
|
|
1959
|
10,234
|
1974
|
10,187
|
|
1960
|
12,900
|
1975
|
10,648
|
|
1961
|
11,879
|
1976
|
11,645
|
|
1962
|
9,075
|
1977
|
10,975
|
|
1963
|
10,396
|
1978
|
12,375
|
|
1964
|
10,746
|
1979
|
10,357
|
|
1965
|
13,056
|
1980
|
13,078
|
|
1966
|
12,874
|
1981
|
10,284
|
|
1967
|
11,789
|
1982
|
9,993
|
|
1968
|
10,678
|
1983
|
11,964
|
|
1969
|
10,357
|
1984
|
9,876
|
|
1970
|
9,234
|
1985
|
12,675
|
|
1971
|
10,345
|
1986
|
10,467
|
|
1972
|
11,465
|
1987
|
13,127
|
|
1973
|
12,385
|
|
|