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papajohn01
06-08-2011, 03:59 PM
The number N of worldwide airline passengers in millions from 1950 to 2000 is approximated by
N= 0.68y squared + 3.8y + 24
Where y = 0 corresponds to 1950, y = 1 to 1951, and so on until y = 50 corresponds until 2000.
a) Estimate the number of airline passengers in 1970.
b) Use a table of values to estimate the year in which the number of airline passengers reached 544 million.

JeffM
06-08-2011, 04:30 PM
The number N of worldwide airline passengers in millions from 1950 to 2000 is approximated by
N= 0.68y squared + 3.8y + 24
Where y = 0 corresponds to 1950, y = 1 to 1951, and so on until y = 50 corresponds until 2000.
a) Estimate the number of airline passengers in 1970.
b) Use a table of values to estimate the year in which the number of airline passengers reached 544 million.
What have you done so far? Where are you stuck? Please show what work you have already done so we can know where to help you.

mmm4444bot
06-08-2011, 08:50 PM
a) Estimate the number of airline passengers in 1970.

The symbol y represents the number of years after 1950.

So, the first step for part (a) is to determine the value of y for 1970. How many years after 1950 is 1970?

Next, use this value of y in the given formula to calculate the value of N.