y = a + bx. where y is the dependent variable and x is the independent variable. In this case, the slope is equal to b and a is the intercept. When plotted on a graph, y is determined by the value of x. Regression equations are charted as a line and are important in calculating economic data and stock prices.
I just took a prom dress to be dry cleaned and they are charging $25.00.
1 According to WNDU.com, the average cost to have your roof cleaned is going to range anywhere from $350 to as much as $1,200.2  It will really depend upon the size, the shape, pitch and the infestation of the roof. According to WNDU.com, the average cost to have your roof cleaned is going to range anywhere from $350 to as much as $1,200.