Review the tables of values showing the number of days each year from 1990 to 1997 that air quality in San Diego did not meet federal air quality standards. Which phrase best describes the regression model for the data?

Turner's mom measured his room to see how long the wallpaper border needed to be. if two walls are 15 feet long and two walls are 12 feet long, how long should the strip of border be cut?

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)