A plumber charges a flat fee of $74 to visit a home and examine a clogged drain. The plumber charges an additional $24 spent fixing the drain. The total cost, c (in dollars), for fixing a drain that takes h hours is given by the following.

C=24h+74

The equation given is: C = 24h + 74

This equation represents the total cost, C, for fixing a drain that takes h hours. The fixed fee, $74, is added to the cost of fixing, which is $24 per hour.