So for the first one, -5 is the x value of the function. That means that 0 is the y-value at x=-5. Therefore, the point (-5,0) must be on the graph
2) a. The total amount in your bank would be the initial amount you got from your uncle ($800) plus the $55 you add in every month m
Therefore, x =800+55m
b. You would solve 10000=800+55m for the variable m
c. 10000=800+55m
Subtract 800 from both sides: 9200=55m
Divide both sides by 55 to isolate m: m=9200/55≈167.27 so I would say 168 months
3) m is the change each month, so m would be 2.5
b is the initial weight, so it would be 13.5
Therefore, the equation would be y=2.5x+13.5