A linear regression calculates the line of best fit given all the values. However, since it appears that the relationship between jackpot size and powerball players may be polynomial — growth ...

We solve polynomials algebraically in order to determine the roots - where a curve cuts the \(x\)-axis. A root of a polynomial function, \(f(x)\), is a value for \(x\) for which \(f(x) = 0\).