Each small square on the grid is 1 ft². which estimate best describes the area of this figure? 25 ft² 35 ft² 50 ft² 65 ft²

Suppose that a households monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hundreds of cubic feet, hcf). when graphed, the function gives a line with slope of 1.65. if the monthly cost for 13 hcf is $46.10 what is the monthly cost for 19 hcf?