Pre-caclulus ? ?

(b) find 3 piece-wise functions n(x) for the data algebraically. let n represent the number of threatened and endangered fish species. let x=6 correspond to 1996.

(c) use your models from part (b) to complete the table below:

x 6 7 8 9 10 11 12 13
n(x) ? ? ? ? ? ? ? ?

I do not know what x = to sorry but i tried it see
    0. 61. 62. 63. 64. 65. 66. 67. 68. 69. 70. In Exercises 71–74, assume that the domain of is the set Determine the set of ordered pairs that represents the function 71. 72. 73. 74. Exploration In Exercises 75–78, match the data with one of the following functions and determine the value of the constant that will make the function fit the data in the table. 75. 76. 77. 78. In Exercises 79–86, find the difference quotient and simplify your answer. 79. 80. 81. 82. 83. 84. 85. 86. 87. Geometry Write the area of a square as a function of its perimeter 88. Geometry Write the area of a circle as a function of its circumference C. A P. A x 8 fx f8 x 8 fx x , 23 1, x 5 fx f5 x 5 fx 5x, , ft f1 t 1 ft , t 1 1 t 2 , gx g3 x 3 gx , x 3 1 x2 , fx h fx h fx 4x , h 0 2 2x, fx h fx h fx x , h 0 3 3x, f5 h f5 h fx 5x x , h 0 2 , f2 h f2 h fx x , h 0 2 x 1, c f x cx, g x cx2, h x cx, and r x c x fx x 1 fx x 2 fx x fx x 2 3 2 f. A {2, 1, 0, 1, 2}. f fx x 5 x2 9 fx x 4 x fx x 6 6 x fs s 1 s 4 hx 10 x 2 2x gx 1 x 3 x 2 fx 4 x fx 2 3x 4 1 x2 ft 3 g y y 10 t 4 s y 3y y 5 ht 4 t gx 1 2x2 fx 5x2 2x 1 fx x 4, gx 2 x fx 3x 1, gx x 1 gx 2x2 fx x4 2x 2, fx x gx 3x 3 2 2x