What is the constant of proportionality? What does the constant of proportionality mean in the context of this problem

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?

How do you create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1?

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?