Roman ate at a restaurant and gave the server a $4 tip the tip was 20% cost of the meal how much was the meal

The level of co2 emissions, f(x), in metric tons, from the town of fairfax x years after they started recording is shown in the table below. x 2 4 6 8 10 f(x) 26,460 29,172.15 32,162.29 35,458.93 39,093.47 select the true statement.

41/17 as a decimal rounded to the nearest hundredth

How can you tell when x and y are not directly proportional?