Is 7 squared rational, irrational, whole, or natural

Ineed with number 17 i don’t get it at alll

Compare the subtraction problems 6/8 - 5/8 = 1/8 and 6/9 - 7/9 = 1/9 why is the answer to the first problem positive and the answer to the second problem negative

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.