The TLK cell phone company has a basic cell phone plan. This plan includes unlimited talk and text but charges a monthly phone charge fee of $29.00 per month plus $5.50 per 1 GB of data that is used for tha month. Write a linear equation that models the monthly cost (C) of the cell phone based on the number of data GB, (d), used. C= If your monthly cell phone bill was $36.50, how many GB of data did you use?