More than 340 million people visit theme parks each year. Do you think it is because of the roller coasters? You can find 624 roller coasters at theme parks in the United States. The fastest coaster can reach 128 mph! If you want to learn about the roller-coaster riding habits of people, which is the best statistical question you could ask those leaving an amusement park?
Did you ride a roller coaster today?
How fast is the coaster you rode today?
How many times did you ride a coaster today?
How many roller coasters are there at this park?

Look at this system of equations. -3x + 3y = 12 y = x + 4 the solution set of this system is best explained by which of these statements? a) the graphs of the equations are the same line because the equations have the same slope and the same y-intercept. the system has infinitely many solutions. b) the graphs of the equations are parallel lines because they have the same slope but different y-intercepts. the system has no solution. c) the graphs of the equations are lines that intersect at one point because the equations have the same slope but different y-intercepts. the system has exactly one solution. d) the graphs of the equations are lines that intersect at one point because the equations have the same slope and the same y-intercept. the system has exactly one solution.