Make frequency tables for the following data sets. Include columns for relative frequency. Also, make a bar graph for the frequency Final grades of 30 students in a math class:

How do you answer this question? (step by step)

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2