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Coordinate plane problems in all four quadrants

Wang Yong graphed (shown below) the relationship between the temperature ((in C)^{\circ}\text{C}) and his hamster's change in weight ((in g)\text{g}) over the last 1010 days.
What was the hamster's change in weight when the temperature was 5C-5 ^{\circ}\text{C}?
  • Your answer should be
  • an integer, like 66
  • a simplified proper fraction, like 3/53/5
  • a simplified improper fraction, like 7/47/4
  • a mixed number, like 1 3/41\ 3/4
  • an exact decimal, like 0.750.75
  • a multiple of pi, like 12 pi12\ \text{pi} or 2/3 pi2/3\ \text{pi}
g\text{g}