What does plus do? i have plus yet i feel like it doesnt do anything

Classify the following triangle check all that apply

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?

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out