How do you solve question 43 and 44?

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?

∆red ≅ ∆ by rule will give brainiest if possible

Wich statement could be used to explain why the function h(x)= x^3 has an inverse relation that is also a function