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=0.25g+20 , where c is the total cost per month for water services and g is gallons used, how do you write the ordered pair to show the usage of 1,200 gallons? (2 points)

Answer 1

To write the ordered pair that shows the usage of 1,200 gallons, we need to calculate the total cost \( c \) using the function given:

\[ c = 0.25g + 20 \]

Substituting \( g = 1200 \):

\[ c = 0.25(1200) + 20 \] \[ c = 300 + 20 \] \[ c = 320 \]

So, the ordered pair, showing the usage of 1,200 gallons and the corresponding total cost, is:

\[ (1200, 320) \]

This means for 1,200 gallons used, the total cost is $320.