Question

Please help I’m begging

Answer 1

So I didn’t read the whole thing but 20 is b.

Answer 2

You've got #17 correct.
#18, left and right is the change of x, up and down is the change of y
x-1+2=x+1, y+3-4=y-1, so the answer is a.
#19. (105-70)/(3-2)=35/1, you get the same answer if you do (140-105)/(4-3)
the answer is again a. 
#20. to determine is a relation is a function, if each x value results in only one y value, the relation is a function. Only b satisfies this condition.