Question

The city’s water company charges a fee of $20 a month in addition to a $0.25 per every gallon used. Using the function c=0.25x+20
, where c is the total cost per month for water services and x is the gallons used, which of the following points on the graph accurately represents a monthly usage of 1,200 gallons?(1 point)
Responses

(320, 1,200)
(320, 1,200)

(1,200, 320)
(1,200, 320)

(1,200, 300)
(1,200, 300)

(1,200, −180)
(1,200, −180)

Answer 1

(x, c) = (1,200, 320)

Because c = 0.25(1200) + 20 = 300 + 20 = 320, so the point is (1200, 320).