Graph the system of equations on graph paper to anwser the question y=1/3x-2 y=-3x-12

Which of the following would represent the sum of 3 consecutive integers if x is the first integer?

Astandard american eskimo dog has a mean weight of 30 pounds with a standard deviation of 2 pounds. assuming the weights of standard eskimo dogs are normally distributed, what range of weights would 99.7% of the dogs have? approximately 26–34 pounds approximately 24–36 pounds approximately 28–32 pounds approximately 29–31 pounds

Can someone me out here number 4 plz