Is a horizontal line a linear function

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

Solving algebraic equations 2m+3=11