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b) (-3). (-2). (-1). 0. 1
17. 12. 7. 2. (-3)
c) range = {-3, 2, 7, 12, 17}
d) {(-3,17),(-2,12),(-1,7),(0,2),(1,-3)}
e) f(7) = 2 - 5.7 = 2 - 35 = (-33)
f) f(a) = 2 - 5a
27 = 2 - 5a
27 - 2 = - 5a
25 = - 5a
a = 25 / (-5)
a = (-5)