Which of the following equations represents a linear proportional function? A.4y= x - 5
B. y=2/5x
C. y=3x+7
D. y=3/2x-4

I beg help

What is the average rate of change for this function for the interval from x=2 to x=4 ?

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?

If i have one apple and give you the apple, how many apples do i have?