Will mark brainliest just plz answer

Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

15 points what is the end behavior of this graph? & what is the asymptote of this graph?