Asap! what is the mean and median! ?

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?

Is the point (0, 8) on the x-axis or y-axis? how do you know?

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x