The answer is -7+19i because of the procedure used in math
360/12 = 30deg...so the arguments are multiples of 30deg.
2 years will be 80 cats (20 x 2 = 40 (year 1) and 40 x 2 = 80 (year 2))
3 years will be 160 (80 x 2 = 160)
5 years will be (160 x 2 = 320 (year 4) and 320 x 2 = 640 (year 5)) So 5 years will be 640
4^x+3 (the x + 3 is included in the power). That's just another way that you could write that.
Eq. of given line is x = -2 》x + 2 = 0