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.
Sarah Hoffer, an 18-year-old high school senior in St. Louis, spent $259 on her prom dress, which required an extra $220 in alterations. On average, families expect to spend $1,139 on prom this year -- up roughly 40% from 2011's $807 average and a slight increase from last year, according to a Visa survey.amilies in the Northeast expect to pay the most, an average of $1,528, while Midwestern families were the most frugal, at an average of $722, according to the survey of more than 1,000 parents of prom-aged teens.