tolong bantu plisss...

f (x) = 3x - 5
daerah asal = { 1 2 3 4 5 6 7 8}
a. f(1) = 3 (1) - 5 = 3 - 5 = -2
f(2) = 3 (2) - 5 = 6 - 5 = 1
f(3) = 3 (3) - 5 = 9 - 5 = 4
f(4) = 3 (4) - 5 = 12 - 5 = 7
f(5) = 3 (5) - 5 = 15 - 5 = 10
f(6) = 3 (6) - 5 = 18 - 5 = 13
f(7) = 3 (7) - 5 = 21 - 5 = 16
f(8) = 3 (8) - 5 = 24 - 5 = 19

b. tinggal gambar diagram cartesiusnya sudah ada nilainya ok