After three months of living at her new apartment, Renae had one dog. Eight months later, Renae still had one dog. Which of the graphs below models Renae's dog population? a) graph of line going through 1, 0 and 1, 8. b) graph of line going through 1, 2 and 3, 4. c) graph of line going through 2, 1 and 4, 3. d) graph of line going through 0, 1 and 7, 1.