An electrician charges $40 per hour plus an initial service fee of $75. He charges a customer $195 for 3 hours of work.
When this linear relationship is graphed, which value represents the slope?
The slope of a linear relationship represents the rate of change in the dependent variable (in this case, the total cost) for a one unit change in the independent variable (in this case, the number of hours).
In this case, the slope would be $40 per hour, as this is the rate at which the cost increases for each additional hour of work.
Therefore, the slope in this linear relationship represents $40 per hour.