The table shows the minimum wage rates for the United States during different years.
Year minimum hourly wage
1978 2.65
1979 2.90
1980 3.35
1990 3.80
1991 4.25
1996 4.75
1997 5.15
2007 5.85
2008 6.55
2009 7.25 (a) Write the least squares regression equation that models the data. Let x = time in years since 1900 and let y = minimum hourly wage. (b) Use the equation to estimate the minimum hourly wage of a U. S. worker in 2025. Show your work.