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f : x = 4x - 1
f(x) = 4x - 1
f(-5) = 4(-5) - 1 = -20 - 1 = -21
f(-3) = 4(-3) - 1 = -12 - 1 = -13
f(-1) = 4(-1) - 1 = -4 - 1 = -5
f(0) = 4(0) - 1 = 0 - 1 = -1
f(2) = 4(2) - 1 = 8 - 1 = 7
f(4) = 4(4) - 1 = 16 - 1 = 15
f(10) = 4(10) - 1 = 40 - 1 = 39