Please help !! 88pts

1. the following set of data represents the number of waiting times in minutes from a random sample of 30 customers waiting for service at a department store. 4 5 7 10 11 11 12 12 13 15 15 17 17 17 17 17 18 20 20 21 22 22 23 24 25 27 27 31 31 32 a. determine the number of classes and class interval.

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?