if the probability that an event will occur is 2/5, then the probability that the event will not occur is 3/5, and the odds in favor of the events occurring are?

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?