Aplumber charges $45 per hour, plus a one-time fee for making a house call. the total fee for 3 hours of service is $285. write the point-slope form of an equation to find the total fee y for any mumber if hours

  y - 285 = 45(x - 3)

Step-by-step explanation:

The given point is (hours, fee) = (3, 285), and the slope is given as 45 per hour.

The point-slope form of the equation for a line is ...

  y - k = m(x - h) . . . . . . . for a slope m and a point (h, k)

Using the given values, and letting x stand for the number of hours, the equation is ...

  y - 285 = 45(x - 3)