Anyone know how to answer this question?

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike

Lorne subtracted 6x3 – 2x + 3 from –3x3 + 5x2 + 4x – 7. use the drop-down menus to identify the steps lorne used to find the difference.

100 points, hi, i’m not sure how to get the equation from the graph and table.