Please help need it please please help me

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.

Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function

What are “like terms”? why can we only add like terms?