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

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

(1,200,300)
left parenthesis 1,200 comma 300 right parenthesis

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

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

Answer 1

Plug x = 1200 into c = 0.25x + 20:

c = 0.25(1200) + 20 = 300 + 20 = 320.

So the correct point is (1200, 320).