How do I determine what m and b represent in a number problem

Question

Determine what m and b represent

The cost, in dollars, of retaining the service a tv repairman in Minnesota is given by

T(x)=64x+34, where x is the number of hours worked.

Answer 1

m is the slope and in a linear equation it is the coefficient of x which in this case is 64. The man works at a rate of $64 per hour. b represents a fixed charge, which would be a callout charge of $34 for the repairman, even if he didn’t work any hours.