G. exponent A. extremes C. numerical order E. ranking H. algebra B. graph D. range F. variable 78. A letter that is used in place of a numeral. 79. The branch of mathematics that uses letters, called variables, in places of numerals. 80. F The n in X" indicating the number of factors of X. 81. C Data in order from smallest to largest or vice-versa. 82. A pictorial representation of data. 83. The two outer terms of a proportion. 84. The difference between the greatest and least numbers in a list of data. 85 Data organized in ascending or descending order. Practical Test