Question

How do you create a function based on a table?

Answer 1

Columns of tables in Desmos.com have different behavior depending their headings. If you put an function of x in the 2nd header we'll fill it in as a function table, calculating the values for you.

For example, if you have "x" and "2x+1" as your headings, we'll fill in the 2nd column for any point you put in the first:

Screen_Shot_2013-12-29_at_9.49.21_PM.png



Note that you can write rich math expressions in the cells, including things like pi/2:

Screen_Shot_2013-12-29_at_9.49.59_PM.png



To compare two functions side by side, add another column and enter another function into the new heading:

Screen_Shot_2013-12-29_at_9.50.20_PM.png



Note that you can convert any graphed function into a function table, by pressing the "edit" button, and then the "generate table" option for that function:

Answer 2

Screen_Shot_2013-12-29_at_9.49.21_PM.png