<span>The "range" of a list a numbers is just the difference between the largest and smallest values. Example: 3, 3, 5, 6, 7, 10 The range would be 10-3=7</span>
It's a proportion. 2 is to x as 15 is to 9, or 2/x = 15/9. Multiply the means and extremes 15x = 18 divide both sides by 15 to get x by itself. x = 1.2
