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 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)
left parenthesis 320 comma 1,200 right parenthesis

(1,200,−180)
left parenthesis 1,200 comma negative 180 right parenthesis

(1,200,320)
left parenthesis 1,200 comma 320 right parenthesis

(1,200,300)

Answer 1

Evaluate c = 0.25(1200) + 20 = 300 + 20 = 320. So the correct point is (1200, 320).