The Bedrock water department has a monthly service charge of $12.30 and a volume charge of $1.70 for every 100 cubic feet of water. Which of the following equations can be used to determine the Sandstone family's monthly water bill? (Let x represent 100 cubic feet of water and y represent the monthly cost.)

The equation 1.70x + 12.30y = c could be an expression that represents this situation because the expression above states that $1.70 for every 100 cubic feet of water plus the service charge of $12.30 per month will equal the total cost, c.

y = 1.7x + 12.30

(1,4) is on graph of f(x)

f(1) = 4

so 1/4 f(x)

1/4 f(1)

1/4. ×4

1

so point for function 1/4. f(x) is (1,1)

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