What 2 things enter into everything case when work is done?

May someone explain how to do this question?

3. on your graph, the data points between the black squares are data for elements with atomic numbers 3 through 9. locate these elements on your periodic table. what term or description would you use to identify these elements with respect to the periodic table?

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant