# How Are Inputs and Outputs Related Through A Model?

When working with a model, you need to pay careful attention to the units on each variable.

Problems 1 The number y (in millions) of women in the workforce is given by the function $\displaystyle y=0.006{{x}^{2}}-0.018x+5.607$ where x is the number of years after 1900.

a. Find the value of y when x = 44. Explain what this means.

b. Use the model to find the number of women in the workforce in 2010.

The solution above is the correct strategy, but there is an error…can you find the error?