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 gallons used, which of the following points on the graph accurately represents a monthly usage of 1,200 gallons? (1 point)
Responses
(1,200 , 320)
(1,200 , 320)
(1,200 , 300)
(1,200 , 300)
(1,200 , –180)
(1,200 , –180)
(320 , 1,200)
To determine which point accurately represents a monthly usage of 1,200 gallons, we substitute x = 1,200 into the equation c = 0.25x + 20.
c = 0.25(1,200) + 20
c = 300 + 20
c = 320
Therefore, the correct point that represents a monthly usage of 1,200 gallons is (1,200, 320).