The graph depicts a scatter plot showing the braking distance, in feet, of a car traveling at selected speeds, in miles per hour. The horizontal (x) axis represents the speed of a car and the horizontal axis spans from 0 miles per hour to 70 miles per hour with a scale of 10 miles per hour. The vertical (y) axis represents the braking distance of a car, and the vertical axis spans from 0 feet to 325 feet, with a scale of 25 feet. Six points are plotted on the graph: (20 mph, 40 feet), (30mph, 75 feet), (40 mph, 118 feet), (50 mph, 175 feet), (60 mph, 240 feet), and (70 mph, 315 feet). The scatter plot pictured above shows the relationship between two variables: speed of a vehicle and braking distance. The vertical axis represents braking distance in feet or the distance it takes for a car to stop. The horizontal axis represents speed, in miles per hour. The speed of the vehicle is the independent variable. The braking distance is the dependent variable since the braking distance depends on the speed of the car. By looking at the scatter plot, a clear relationship exists between these two sets of data. The relationship between the variables is positive (positive correlation), since the braking distance increases as the speed of the vehicle increases. Additionally, since the plotted values appear to be linear, the relationship between the variables seems to be strong. Logically, this makes sense, as one would expect there to be a strong relationship between braking distance and speed. The relationship between braking distance and speed is beneficial for drivers so that they