The table shows the minimum wage rates for the united states during different years. year 1978 1979 1980 1990 1991 1996 1997 2007 2008 2009 minimum hourly wage ($) 2.65 2.90 3.35 3.80 4.25 4.75 5.15 5.85 6.55 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.