The number of prisoners measured in thousands can be described by the polynomial -2.06x^2+77.85x+750. According to the polynomial, by how much did the prison population increase from 2002 to 2007?

Answer 1

The question only makes sense if we know the definition of x.
Is x the number of years since 2000?

Answer 2

Thanks I figured it out. The definition of x is the numbers since 1990.