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 On average, contractors are going to charge anywhere from $0.15 to $0.40 per square foot to professionally clean your roof. 2  For example, if you have a 1,500 square foot roof, your costs will probably be between $225 and $600.3  Since every roof is going to have its own set of needs, quotes are going to vary. 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.