Please help me graph thisGraph Y=-2x-7

How do i do this? i don’t understand

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.