The graph of a function must be linear if it has what characteristic?

Ineed with number 6 , explain how to get 1978

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?

Drag the tiles to the correct boxes to complete the pairs. label each function. as even , odd, or neither.