contestada

(1 point) A repair company charges a fixed amount plus an hourly rate for a service call. Suppose it charges $200 for one-hour and $288 for five-hour call. Find a linear function that describes the price of a service call in terms of x, the number of hours.

Respuesta :

TomShelby

Answer:

tariff = 22x + 178

Explanation:

We use high-low method

hours   total cost

     1         200

     5         288

We subtract one from the other and get the information about hte slope:

4 hours generate cost for 88 dollars

we divide and get the slope:

88/4 = 22

now we replace and the the fixed cost:

total cost - variable cost = fixed cost

200 - 22(1) = 178 fixed cost

288 - 22(5) = 178 fixed cost

tariff = 22x + 178

Otras preguntas