These two avenues to logical conclusions differ in specific ways.  Deductive (de: from; ductive: drawn) gets to a conclusion by moving from known data to new data: inductive (in: toward; ductive: drawn) moves toward new data from known data.  Inductive reasoning is not mathematical; that is, the new data is implied but not proven from the old data.  Deductive reason is irrefutable; the simplest form is “All A is B; all B is C; therefore all A is C” (all kangaroos are marsupials: all marsupials are animals; therefore, all kangaroos are animals).  Inductive reasoning deals not with “therefore” but with “maybe”:  All marsupials live in Australia; koalas live in Australia; therefore (?) koalas are marsupials.  (How about platypuses?  Kuckaburras? Dingos?)

   So, claim 1. is deductive; claim 2. is inductive.  Claim 3. is simply invalid, since the information given leads to no conclusion at all; the information does not state that the only reason he does or does not play video games depends on his homework habits.